Explanation at your level:
Hello! 不明な (fumei na) is a word that means 'not known' or 'not clear.' Imagine you have a question, but you don't know the answer. That's when you can say the answer is fumei. It's like a little mystery! For example, if you lost your toy, and you don't know where it is, its location is fumei. It's a simple way to say 'I don't know' about something.
The Japanese adjective 不明な (fumei na) means 'unknown' or 'unclear.' You use it when you don't have enough information about something. For example, if a package hasn't arrived and you don't know where it is, its status is fumei. Or, if someone is sick and the doctors don't know why, the cause is fumei. It's a useful word for situations where clarity is missing.
不明な (fumei na) is an adjective that signifies a state of being unknown, unclear, or uncertain. It's frequently used in various contexts to indicate a lack of information or understanding. For instance, 原因不明 (gen'in fumei) means 'cause unknown,' and 連絡不明 (renraku fumei) means 'unreachable.' You might encounter it when discussing missing persons (行方不明 - yukue fumei) or when a situation's details are not yet established.
The adjective 不明な (fumei na) denotes a lack of certainty, clarity, or knowledge. It's more formal than simply saying 'I don't know' and is often used in official reports, news, or academic contexts. Common collocations include 状況不明 (jōkyō fumei - situation unclear) and 意図不明 (ito fumei - intentions unclear). Understanding its usage helps in grasping nuances in communication, especially when dealing with ambiguous or incomplete information.
不明な (fumei na) serves as a crucial adjective to articulate ambiguity and the absence of definitive knowledge. Its application extends beyond simple lack of information to encompass situations where facts are obscured, identities are concealed, or outcomes are indeterminate. Consider its use in technical or legal documents where precision is paramount; 不明な点 (fumei na ten) highlights areas requiring further investigation. It can also subtly imply a deliberate withholding of information or an inherent complexity that defies easy explanation.
Mastering 不明な (fumei na) involves appreciating its semantic depth and pragmatic functions. Beyond its literal meaning of 'unknown' or 'unclear,' it can carry connotations of mystery, suspense, or even official obfuscation depending on the context. Its etymological roots in 'not clear' hint at a spectrum of uncertainty, from simple lack of data to profound existential ambiguity. Analyzing its deployment in literature, historical records, or philosophical discourse reveals its power in framing unknowns and shaping reader/listener perception regarding the indeterminate aspects of reality.
Mot en 30 secondes
- Means 'unknown', 'unclear', or 'uncertain'.
- Often used in formal or factual contexts.
- Common collocations: 原因不明, 行方不明, 不明な点.
- Distinguish from 分からない (personal 'I don't know').
Hey there! Let's dive into the Japanese adjective 不明な (fumei na). It's a super useful word that basically means 'unknown,' 'unclear,' or 'uncertain.' Think of it as a way to say that something isn't easily understood or known. It's like a little puzzle piece that's missing, or a foggy day where you can't see very far. We use it when we don't have all the facts, or when something is a bit mysterious. It's a common adjective you'll encounter in many different situations, from everyday conversations to more formal writing.
When something is 不明, it means there's a lack of clarity. This could be about a person's whereabouts, the reason behind an event, or even the exact details of a plan. It’s the opposite of being obvious or well-defined. For instance, if a package's delivery status is 不明, it means no one knows where it is right now. Similarly, if someone’s intentions are 不明, it means we can’t be sure what they plan to do. It’s a versatile word that helps us express a state of not knowing.
The word 不明 (fumei) comes to us from Chinese characters, which is common in Japanese! The kanji '不' (fu) means 'not' or 'un-', and '明' (mei) means 'bright,' 'clear,' or 'understand.' So, literally, it means 'not clear' or 'not understood.' This makes perfect sense when you think about its meaning!
The concept of something being 'unclear' or 'unknown' has existed in language forever, but the specific combination '不明' became standardized in Japanese over centuries of borrowing and adapting Chinese vocabulary. It's a classic example of how East Asian languages share linguistic roots. Over time, adding the adjectival particle 'な' (na) transforms it into the adjective form 不明な (fumei na), ready to describe nouns. It's a word that has stood the test of time because the need to express uncertainty is a fundamental part of human experience.
You'll find 不明な (fumei na) popping up in all sorts of places! It's often used to describe situations where information is missing or ambiguous. For example, you might see 原因不明 (gen'in fumei), meaning 'cause unknown,' or 連絡不明 (renraku fumei), meaning 'contact unknown' or 'unreachable.' It's also common with statuses, like 状況不明 (jōkyō fumei), 'situation unclear.'
In a more casual setting, you might use it to describe something you personally don't understand. However, it leans a bit more towards formal or neutral contexts. You wouldn't typically use it for something super simple like not knowing what to eat for lunch unless you wanted to sound a bit dramatic or formal about it! Think of it as a reliable adjective for expressing a genuine lack of knowledge or clarity. It pairs well with nouns that represent states, causes, identities, or information.
While 不明な (fumei na) itself isn't usually part of a fixed idiom, it appears in many common set phrases that function like idioms because they have specific, established meanings. Here are a few:
- 原因不明 (gen'in fumei): This literally means 'cause unknown.' It's used when the reason for something happening cannot be identified. Example: その病気の原因は未だに不明だ。(Sono byōki no gen'in wa imada ni fumei da.) - The cause of that illness is still unknown.
- 連絡不明 (renraku fumei): Meaning 'contact unknown' or 'unreachable.' This is used when someone cannot be contacted. Example: 彼は数週間連絡不明になっている。(Kare wa sū-shūkan renraku fumei ni natte iru.) - He has been unreachable for several weeks.
- 生死不明 (seishi fumei): This translates to 'life or death unknown,' meaning someone's fate is uncertain, often after a disaster. Example: 地震の後、多くの人が生死不明となった。(Jishin no ato, ōku no hito ga seishi fumei to natta.) - After the earthquake, many people's fates were unknown.
- 行方不明 (yukue fumei): This means 'whereabouts unknown,' very similar to 'missing.' Example: 子供が行方不明になったと警察に通報した。(Kodomo ga yukue fumei ni natta to keisatsu ni tsūhō shita.) - They reported to the police that their child had gone missing.
- 意図不明 (ito fumei): 'Intentions unclear.' Used when someone's motives or plans are not understood. Example: 彼の意図は不明瞭で、信用できなかった。(Kare no ito wa fumeiryō de, shin'yō deki nakatta.) - His intentions were unclear, and I couldn't trust him. (Note: 意図不明瞭 (ito fumeiryō) is also common here).
As an adjective, 不明な (fumei na) behaves like other 'na'-adjectives in Japanese. This means it needs 'な' (na) when it directly modifies a noun. For example, 不明な点 (fumei na ten) means 'unclear points.' When used predicatively (at the end of a sentence), you can often just use です (desu) or だ (da) after 不明, like それは不明です (Sore wa fumei desu) - 'That is unknown.'
Pronunciation is straightforward: fu-mei na. The stress is relatively even across the syllables. In terms of IPA, it would be approximately /fɯ̈me̞i̯ na̠/. There aren't really plural forms for adjectives in Japanese in the way English has plurals for nouns. The concept of countability also doesn't apply in the same way. When it comes to pronunciation, common errors might involve mispronouncing the 'fu' sound or not clearly distinguishing the 'ei' diphthong. Rhyming words are less common in Japanese due to its syllable structure, but words ending in '-ei' might share some phonetic similarities.
Fun Fact
The character 明 itself is composed of 日 (sun) and 月 (moon), symbolizing clarity and illumination. So, 不明 is literally 'not sun and moon' - lacking illumination.
Pronunciation Guide
Sounds like 'foo-MAY nah', with a clear distinction between the 'u' and 'e' sounds, and a slightly longer 'ah' at the end.
Similar to UK, with the 'f' sound being common. The 'ei' is a diphthong, like in 'say'.
Common Errors
- Pronouncing 'fu' as 'foo' with a rounded lip.
- Not clearly distinguishing the 'e' and 'i' in 'mei'.
- Adding an unnecessary stress on 'na'.
Rhymes With
Difficulty Rating
Requires understanding context for nuance.
Choosing between synonyms and correct collocation.
Using it naturally in conversation, especially in formal contexts.
Recognizing it in news or formal speech.
What to Learn Next
Prerequisites
Learn Next
Avanc
Grammar to Know
Na-Adjective Conjugation
不明な + Noun (fumei na + Noun)
Using です/だ for Predicate
原因は不明です。(Gen'in wa fumei desu.)
Nominalization with の
どこへ行ったのか不明です。(Doko e itta no ka fumei desu.)
Examples by Level
おもちゃは 不明 な ところ に あります。
toy-topic unknown place in is
な is used before a noun.
その こたえ は 不明 です。
that answer-topic unknown is
です is used at the end of a sentence.
あした の てんき は 不明 だ。
tomorrow 's weather-topic unknown is
だ is a casual form of です.
どこに いったか 不明 です。
where-topic went-topic unknown is
か is used to form a question within a sentence.
これは 不明 な もの です。
this-topic unknown thing is
もの means 'thing'.
わたし の かばん は 不明 です。
my bag-topic unknown is
の shows possession.
ふくろ の なか は 不明 です。
bag 's inside-topic unknown is
なか means 'inside'.
かれ の いみ は 不明 です。
his meaning-topic unknown is
かれ means 'he'.
この レポート の さいご の ページ が 不明 です。
this report 's last page-topic unknown is
が marks the subject.
その 事件 の 原因 は まだ 不明 です。
that incident 's cause-topic still unknown is
まだ means 'still'.
彼 の 居場所 は 不明 で、心配です。
his whereabouts-topic unknown and, worried-am
で connects clauses.
会議 の 時間 が 不明 な ので、確認してください。
meeting 's time-topic unknown because, please confirm
ので means 'because'.
その 質問 の 答え は 不明 です。
that question 's answer-topic unknown is
質問 (shitsumon) means 'question'.
約束 の 場所 が 不明 に なりました。
appointment 's place-topic unknown became
に なりました indicates a change of state.
彼の 計画 は 不明 な 点 が 多い。
his plan-topic unclear points-topic many
点 (ten) means 'point'.
この 薬 の 副作用 は 不明 です。
this medicine 's side effect-topic unknown is
副作用 (fukusayō) means 'side effect'.
その 事故 の 詳細 は 未だ 不明 です。
that accident 's details-topic still unknown is
未だ (imada) means 'still' or 'yet'.
連絡先 が 不明 な ため、直接伺うことができません。
contact information-topic unknown because, directly visit cannot
ため (tame) means 'because' or 'for the sake of'.
彼の 過去 については 不明 な 点 が 多い。
his past about-topic unknown points-topic many
〜については (ni tsuite wa) means 'regarding' or 'about'.
この 論文 で は、まだ 解明されていない 問題 が 不明 な まま です。
this paper in-topic, still not solved problem-topic unknown state is
〜まま (mama) means 'while remaining in a state'.
不明 な 点 が あれば、遠慮なく 質問してください。
unclear points-topic exist if, without hesitation ask please
遠慮なく (enryo naku) means 'without hesitation'.
その 遺物 の 出所 は 不明 で、専門家 も 首 を かしげている。
that artifact 's origin-topic unknown and, experts also head-object scratching
首をかしげる (kubi o kashigeru) is an idiom meaning 'to scratch one's head' (in confusion).
新しい 技術 の 効果 は まだ 不明 な 部分 が ある。
new technology 's effect-topic still unknown parts-topic exist
部分 (bubun) means 'part' or 'portion'.
彼の 突然 の 辞任 の 理由 は 不明 の まま だ。
his sudden resignation 's reason-topic unknown state is
辞任 (jinin) means 'resignation'.
未解決 の 事件 の 多く は、犯人 や 動機 が 不明 である。
unsolved 's incidents 's many-topic, culprit or motive-topic unknown is
動機 (dōki) means 'motive'.
その 企業 の 経営 状況 は 不明瞭 で、投資家 たちは 懸念 を 抱いている。
that company 's management situation-topic unclear and, investors-plural-topic concern-object are holding
不透明 (futōmei) or 不明瞭 (fumeiryō) are often used for financial or business contexts.
彼の 発言 の 真意 は 不明 であった が、その 裏 に 何か 意図 が ある のだろう。
his statement 's true meaning-topic unknown was but, that behind something intention-topic exist is perhaps
真意 (shin'i) means 'true meaning' or 'real intention'.
その 地域 で 発生した 原因不明 の 病気 について、専門家 が 調査 を 開始した。
that region in occurred cause unknown 's illness about, experts-plural-topic investigation-object started
発生した (hassei shita) means 'occurred' or 'broke out'.
多くの 観測 結果 が 不明 な まま であり、さらなる 研究 が 必要とされている。
many observation results-topic unknown state remain and, further research-object is needed
観測 (kansoku) means 'observation'.
その 古代 文明 の 消滅 の 原因 は、依然として 不明 の まま なぞらえられている。
that ancient civilization 's disappearance 's cause-topic, still unknown state remains shrouded
消滅 (shōmetsu) means 'disappearance' or 'extinction'.
彼の 突然 の 変化 には、何か 不明 な 理由 が 隠されている のではないか と 思われる。
his sudden change in-topic, something unknown reason-topic hidden is is it not thought
〜ではないか (de wa nai ka) expresses conjecture or doubt.
この 技術 の 長期 的な 影響 は 不明 であり、慎重な 評価 が 求められる。
this technology 's long-term effect-topic unknown is and, careful evaluation-object is sought
長期的 (chōki teki) means 'long-term'.
その 芸術家 の 作品 には、しばしば 解釈 が 不明瞭 な 要素 が 含まれている。
that artist 's works in-topic, often interpretation-object unclear elements-topic are included
解釈 (kaishaku) means 'interpretation'.
現代社会 における 個人情報 の 保護 に関する 法整備 は、依然として 不明瞭 な 点 を 残している。
modern society in 's personal information 's protection regarding law-making-topic, still unclear points-topic are left
法整備 (hō seibi) means 'establishment of laws' or 'legal framework'.
彼の 政治 的な 立場 は 不明瞭 で、その 発言 は 多様な 解釈 を 許していた。
his political position-topic unclear and, those statements-plural-topic diverse interpretations-object were allowing
立場 (tachiba) means 'position' or 'stance'.
その 奇妙な 現象 の 原因 については、科学 的な 説明 が 不明 な まま で、様々な 仮説 が 提唱されている。
that strange phenomenon 's cause about-topic, scientific explanation-object unknown state remains and, various hypotheses-plural-topic are being proposed
現象 (genshō) means 'phenomenon'.
この 文学 作品 における 象徴 的な 意味合い は、読者 によって 不明瞭 さを 感じさせる ことがある。
this literary work in 's symbolic meaning-topic, by readers depending-on ambiguity-object makes feel sometimes
象徴的 (shōchō teki) means 'symbolic'.
その 組織 の 資金 源 は 不明 で、その 活動 の 真 の 目的 については 憶測 が 飛び交っている。
that organization 's funding source-topic unknown is, that activities 's true purpose about-topic-object speculation-plural-topic are flying around
憶測 (okusoku) means 'speculation'.
技術 革新 の 社会 への 影響 は、依然として 不明瞭 な 点 が 多く、慎重な 議論 が 不可欠である。
technological innovation 's society to-ward effect-topic, still unclear points-topic many and, careful discussion-object is indispensable
不可欠 (fukaketsu) means 'indispensable' or 'essential'.
彼 の 沈黙 の 裏 には、複雑で 不明瞭 な 心理 が 働いている に 違いない。
his silence 's behind-topic, complex and unclear psychology-object is working must be
心理 (shinri) means 'psychology' or 'mind'.
その 哲学者 は、存在 の 本質 についての 人類 の 認識 の 不明瞭 さを 指摘した。
that philosopher-topic, existence 's essence about 's humanity 's perception 's ambiguity-object pointed out
本質 (honshitsu) means 'essence' or 'true nature'.
歴史 的な 文献 における 記述 の 不明瞭 さは、後世 の 研究者 たちに 多様な 解釈 の 余地 を 与えてきた。
historical documents in 's descriptions 's ambiguity-object, later generations 's researchers-plural-topic diverse interpretations 's room-object has given
余地 (yochi) means 'room' or 'scope'.
量子力学 の 世界 では、観測 者 の 影響 によって 粒子 の 状態 が 不確定 であり、その 不明瞭 さが 根源 的な 特性 とされている。
quantum mechanics 's world in-topic, observer 's influence by particle 's state-topic indeterminate is, that ambiguity-object fundamental characteristic is considered
不確定 (fukakutei) means 'indefinite' or 'uncertain'.
その 劇作家 は、登場人物 の 内面 的な 動機 を あえて 不明瞭 に 保つことで、観客 に 深い 考察 を 促した。
that playwright-topic, characters 's inner motives-object deliberately unclear keep by, audience-to deep contemplation-object prompted
あえて (aete) means 'deliberately' or 'dare to'.
言語 の 進化 における 語源 の 不明瞭 さは、言語 学者 たちにとって 永遠 の 謎 の 一つ である。
language 's evolution in 's etymology 's ambiguity-object, linguists-plural-topic for eternal mystery 's one is
語源 (gogen) means 'etymology'.
現代 美術 において、作者 の 意図 が 不明瞭 であることは、作品 の 解釈 を より 多層 的に する 要因 となりうる。
contemporary art in-topic, artist 's intention-object unclear is-topic, work 's interpretation-object more multi-layered make factor-object can become
多層的 (tasō teki) means 'multi-layered'.
その 宗教 的な 教義 の 起源 は 不明瞭 であり、様々な 神話 や 伝説 が その 形成過程 を 彩っている。
that religious doctrine 's origin-topic unclear is and, various myths and legends-plural-topic that formation process-object are coloring
教義 (kyōgi) means 'doctrine'.
人間の 意識 の 本質 に 迫る 試み は、その 不明瞭 さゆえに、しばしば 形而上学 的な 領域 へ と 踏み込む ことに なる。
human 's consciousness 's essence approach attempts-topic, that ambiguity because-of, often metaphysical realm-to step into become
形而上学的 (keijijōgaku teki) means 'metaphysical'.
Collocations courantes
Idioms & Expressions
"原因不明 (gen'in fumei)"
Cause unknown; the reason for something happening is not identified.
この病気の原因は未だに不明です。
neutral"行方不明 (yukue fumei)"
Whereabouts unknown; missing.
子供が行方不明になったと聞いて心配です。
neutral"連絡不明 (renraku fumei)"
Unreachable; unable to make contact.
彼は数週間連絡不明の状態が続いている。
neutral"生死不明 (seishi fumei)"
Fate unknown; uncertain whether someone is alive or dead.
災害の後、多くの乗客が生死不明となった。
formal"不明瞭な (fumeiryō na)"
Unclear, indistinct, vague (often used for writing, speech, or intentions).
彼の説明は不明瞭で理解できなかった。
formal"不明を恥じる (fumei o hajiru)"
To be ashamed of one's ignorance.
知らないことを恥じるのではなく、学ぶことを怠るのを恥じるべきだ。
literaryEasily Confused
Both mean 'not clear' or 'uncertain'.
不明 implies a lack of factual knowledge or clarity. 曖昧 suggests vagueness, ambiguity, or deliberate lack of precision in meaning or statement.
原因は不明です。(Gen'in wa fumei desu.) - The cause is unknown. / 彼の返事は曖昧だった。(Kare no henji wa aimai datta.) - His reply was vague.
Both relate to uncertainty.
不明 focuses on the lack of knowledge or clarity itself. 不確か emphasizes the doubt or lack of certainty about something that might be known or clear.
その情報は不明です。(Sono jōhō wa fumei desu.) - That information is unknown. / その計画は不確かだ。(Sono keikaku wa futashika da.) - That plan is uncertain.
Both express a lack of knowing.
分からない is the general, often personal, way to say 'I don't know' or 'I don't understand'. 不明 is more objective and formal, describing a state of being unknown.
この漢字は分からない。(Kono kanji wa wakaranai.) - I don't know this kanji. / 彼の身元は不明です。(Kare no mimoto wa fumei desu.) - His identity is unknown.
Both can relate to things not being openly known.
不明 means unknown due to lack of information or clarity. 秘密 means secret, implying it is intentionally kept hidden and known by only a few.
その事件の真相は不明だ。(Sono jiken no shinsō wa fumei da.) - The truth of that incident is unknown. / これは秘密です。(Kore wa himitsu desu.) - This is a secret.
Sentence Patterns
Noun + は/が + 不明です/だ。
事故の原因は不明です。(Jiko no gen'in wa fumei desu.) - The cause of the accident is unknown.
不明な + Noun
不明な点がいくつかあります。(Fumei na ten ga ikutsuka arimasu.) - There are several unclear points.
Noun + は + 不明な + まま + です/だ。
彼の状況は不明なままだ。(Kare no jōkyō wa fumei na mama da.) - His situation remains unknown.
Verb (plain form) + のか + 不明です/だ。
どこへ行ったのか不明です。(Doko e itta no ka fumei desu.) - It is unknown where he went.
Noun + として + 不明
身元不明者として扱われた。(Mimotofumeisha toshite atsukawareta.) - He was treated as a person of unknown identity.
Famille de mots
Nouns
Adjectives
Apparenté
How to Use It
Formality Scale
Erreurs courantes
不明な usually refers to external circumstances or information, not personal memory lapses. For personal memory, 分からない (wakaranai) is more natural.
不明 is broader (unknown), while 不明瞭 specifically relates to lack of clarity in appearance or meaning.
Like other na-adjectives, it requires な before the noun it modifies.
不明 means unknown or unclear, not difficult. While difficult things might have unclear aspects, the core meaning is different.
It simply states a lack of information, which can be neutral (like weather forecasts) or negative (like a missing person).
Tips
Memory Palace Trick
Imagine a dark, foggy room (不明 - fumei) where you can barely see. In the center is a sign that says 'MAYBE?' (mei). The fog and the 'maybe' remind you it's unclear.
When Native Speakers Use It
Listen for 不明 in news reports about accidents or missing persons, or in official notices asking for clarification (不明な点があれば). It signals a factual lack of information.
Cultural Insight
Japanese culture sometimes values indirectness. Using 不明 can be a polite way to state a lack of information without being blunt, especially in formal settings.
Grammar Shortcut
Remember: 'na' adjective + noun (不明な点). Verb/Noun + です/だ (原因は不明です). Easy!
Say It Right
Focus on the 'ei' sound in 'mei' – it's a glide, not two separate sounds. Fu-MEI-na. Practice saying it smoothly.
Don't Make This Mistake
Avoid using 不明 for simple personal 'I don't know'. Stick to 分からない for everyday forgetfulness or lack of personal understanding.
Did You Know?
The kanji 明 (mei) means 'bright' or 'clear'. So, 不明 (fumei) literally means 'not bright' or 'not clear' – a very visual concept!
Study Smart
Create flashcards for common collocations like 原因不明, 行方不明, and 不明な点. Seeing them in context helps solidify their meaning and usage.
Compare and Contrast
Compare 不明 (unknown), 不明瞭 (unclear/indistinct), and 曖昧 (vague/ambiguous). Understanding these subtle differences is key to advanced fluency.
Memorize It
Mnemonic
Think of 'FUM' as 'foggy' and 'MEI' as 'may' - 'Foggy, may be unclear'. Or, 'FU' sounds like 'few' and 'MEI' like 'maybe' - 'Few maybe' clues, so it's unclear.
Visual Association
Imagine a very foggy landscape where you can't see the road ahead. The path is unclear.
Word Web
Défi
Try describing three things you don't know the answer to using 不明な.
Origine du mot
Chinese (漢語 - Kango)
Original meaning: 不 (fu) = not, un- + 明 (mei) = bright, clear, understand. Literally 'not clear'.
Contexte culturel
Generally neutral, but can be sensitive when referring to missing persons (行方不明) or unclear causes of death/illness.
In English, we might use 'unknown,' 'unclear,' 'uncertain,' 'missing,' 'obscure,' or 'vague' depending on the context. The Japanese 不明な covers a similar range but is often used in more formal or factual reporting.
Practice in Real Life
Real-World Contexts
News Reporting
- 原因不明の事故が発生しました。(Gen'in fumei no jiko ga hassei shimashita.) - An accident of unknown cause occurred.
- 行方不明者の捜索が続いています。(Yukue fumei-sha no sōsaku ga tsuzuite imasu.) - The search for the missing person continues.
- 事件の詳細は不明です。(Jiken no shōsai wa fumei desu.) - The details of the incident are unclear.
Customer Service / Inquiries
- 不明な点がございましたら、お気軽にお問い合わせください。(Fumei na ten ga gozaimashitara, okigaru ni o-toiawase kudasai.) - If you have any unclear points, please feel free to inquire.
- 配送状況が不明です。(Haisō jōkyō ga fumei desu.) - The delivery status is unknown.
- 担当者の連絡先が不明です。(Tantōsha no renrakusaki ga fumei desu.) - The contact information for the person in charge is unknown.
Medical / Scientific
- 病気の原因は不明です。(Byōki no gen'in wa fumei desu.) - The cause of the illness is unknown.
- この物質の長期的な影響は不明です。(Kono busshitsu no chōki-teki na eikyō wa fumei desu.) - The long-term effects of this substance are unknown.
- 未解明な部分が多い。(Mikai meina bubun ga ōi.) - There are many unexplained parts.
Personal Communication (Formal)
- 彼の意図は不明瞭でした。(Kare no ito wa fumeiryō deshita.) - His intentions were unclear.
- その計画の詳細はまだ不明です。(Sono keikaku no shōsai wa mada fumei desu.) - The details of that plan are still unknown.
- ご不明な点がございましたら、ご連絡ください。(Gofumei na ten ga gozaimashitara, go-renraku kudasai.) - If you have any questions, please contact us.
Conversation Starters
"What's something that's currently unknown to you, but you'd like to find out?"
"Have you ever encountered a situation where the cause was completely unknown?"
"What's the most mysterious thing you've ever heard about?"
"When planning something, what kind of uncertainties (不明な点) do you usually consider?"
"If a news report said 'details are unknown,' what kind of situation would you imagine?"
Journal Prompts
Describe a time when you had to deal with a situation where crucial information was unknown (不明). How did you handle it?
Write about something you find mysterious or unclear in the world around you. Use the word 不明 or 不明瞭.
Reflect on a goal you have. What are the unknown factors (不明な点) that might affect your success?
Imagine you are a detective. Describe a case where the motive or the culprit remains unknown (不明).
Questions fréquentes
8 questions分からない (wakaranai) is the general way to say 'I don't know' or 'I don't understand' and is used very commonly in everyday conversation. 不明 (fumei) is more formal and objective, often used to describe situations, facts, or statuses that are unknown or unclear, rather than a personal feeling of not knowing.
Use 不明瞭 when something lacks clarity in its appearance, sound, meaning, or intention. Examples include unclear handwriting (不明瞭な文字), indistinct speech (不明瞭な話し方), or vague intentions (不明瞭な意図).
Not necessarily. While it indicates a lack of information, which can be negative (like a missing person), it can also be neutral, as in weather forecasts (天気は不明です - weather is unclear/unknown) or when stating that further research is needed.
Yes, but usually in specific contexts like 行方不明 (yukue fumei - missing person) or 連絡不明 (renraku fumei - unreachable person). It's less common to say a person themselves is 'fumei' unless referring to their identity or status.
For casual situations, 分からない (wakaranai) is the most common. If you want to emphasize that something is a mystery, you might use 謎 (nazo), like 「それは謎だね」(Sore wa nazo da ne - That's a mystery).
It means 'Are there any unclear points?' or 'Do you have any questions?' It's a polite way to ask if someone needs further clarification.
Yes, words like 隠された (kakusareta - hidden) or 秘密の (himitsu no - secret) imply something is intentionally kept from view, which is different from simply being unknown or unclear.
It's used, but usually in serious contexts like disaster reporting or after major accidents where the fate of individuals is uncertain. It's not a casual phrase.
Teste-toi
あした の てんき は ______ です。
The sentence asks about tomorrow's weather, which is often uncertain. 'ふめい' (fumei) means unclear or unknown.
What does 「原因不明」 mean?
原因 (gen'in) means cause, and 不明 (fumei) means unknown or unclear.
「行方不明」 means someone is definitely found.
行方不明 (yukue fumei) means 'whereabouts unknown' or 'missing'. It implies the person has not been found.
Word
Signification
These are common phrases using 不明 to express different types of uncertainty.
The correct sentence is 「状況はまだ不明です。」(Jōkyō wa mada fumei desu), meaning 'The situation is still unclear.'
彼の発言の______は不明瞭だった。
The sentence talks about unclear speech/statement. 意味 (imi - meaning) fits best here, implying the meaning was unclear.
Which word is the closest synonym for 不明瞭 (fumeiryō) in the context of writing?
ぼやけた (boyaketa) means blurred or hazy, which is similar to 不明瞭 (unclear/indistinct) when referring to visual clarity.
The phrase 「不明を祈る」 is a common expression for wishing someone well.
「不明を祈る」 is a rare and somewhat archaic phrase, often used ironically or in specific contexts related to uncertainty, not general well-wishing.
その古代文明の______は、依然として歴史家の間で議論されている。
興亡 (kōbō - rise and fall) fits the context of an ancient civilization whose fate or history remains debated and unclear.
Create a sentence using 不明瞭 and a word related to abstract concepts.
This sentence correctly uses 不明瞭さ (fumeiryōsa - ambiguity) in an abstract context.
Score : /10
Summary
Use 不明な to state objective unknowns or lack of clarity, especially in formal settings.
- Means 'unknown', 'unclear', or 'uncertain'.
- Often used in formal or factual contexts.
- Common collocations: 原因不明, 行方不明, 不明な点.
- Distinguish from 分からない (personal 'I don't know').
Memory Palace Trick
Imagine a dark, foggy room (不明 - fumei) where you can barely see. In the center is a sign that says 'MAYBE?' (mei). The fog and the 'maybe' remind you it's unclear.
When Native Speakers Use It
Listen for 不明 in news reports about accidents or missing persons, or in official notices asking for clarification (不明な点があれば). It signals a factual lack of information.
Cultural Insight
Japanese culture sometimes values indirectness. Using 不明 can be a polite way to state a lack of information without being blunt, especially in formal settings.
Grammar Shortcut
Remember: 'na' adjective + noun (不明な点). Verb/Noun + です/だ (原因は不明です). Easy!
Exemple
原因は不明なままです。
Related Content
Ce mot dans d'autres langues
Expressions liées
Plus de mots sur general
能力
A1Nouryoku refers to the mental or physical power, skill, or capacity required to perform a specific task or function. It can describe both innate talent and skills acquired through learning and practice.
異常
A1A word used to describe something that deviates from the normal state, standard, or expected pattern. It often implies a problem, malfunction, or an extraordinary occurrence that requires attention or investigation.
～について
A2About, concerning; indicates topic.
〜について
B1About, concerning; on the subject of.
～ぐらい
A2about, approximately
ぐらい
A2About; approximately; to the extent of.
ごろ
A2About, approximately (time).
うえ
A2At a higher position than.
絶対
B1Absolutely; definitely; never.
絶対に
B1Absolutely; definitely.
