切れる

The Japanese verb 切れる (kireru) is a multifaceted powerhouse in the Japanese language, functioning primarily as an intransitive verb. At its most fundamental level, it describes the state of something being physically severed or broken into pieces without an explicit agent performing the action in the immediate grammatical focus. However, its utility extends far beyond simple physical destruction. To understand kireru, one must visualize the concept of a connection or a flow being abruptly halted. Whether that is the physical connection of a rope, the temporal connection of a deadline, the supply connection of a grocery item, or the emotional connection of one's patience, kireru is the word that signals the end of that continuity.

Physical Severance

This refers to objects like thread, rope, or wire snapping under tension. If you are pulling a string and it breaks, you say it 'kireta'.

Resource Depletion

Used when supplies run out. Common examples include batteries dying (battery ga kireru), oil running out, or stock in a store being sold out.

Expiration and Deadlines

When a contract, a license, or the shelf-life of milk reaches its end, the time 'cuts' or expires.

In a more modern and colloquial sense, kireru is famously used to describe someone 'snapping' or losing their temper. This usage implies that the 'thread' of their patience has finally reached its breaking point. When a Japanese person says 'kireta!', they aren't talking about a physical cut; they are expressing that they have lost their cool. Additionally, it can describe someone who is exceptionally 'sharp' or brilliant in their thinking, much like a well-honed blade that 'cuts' through complex problems with ease. This duality of meaning—from physical snapping to intellectual brilliance to emotional outbursts—makes it one of the most expressive verbs in the Japanese lexicon.

The 'Sharp' Mind

When describing a person as 'atama ga kireru', you are complimenting their quick wit and analytical ability. It is a very positive professional trait.

Finally, it is crucial to distinguish kireru as an intransitive verb from its role as the potential form of the transitive verb kiru (to cut). While they look identical in many conjugations, the context usually makes the distinction clear. If you are saying you 'can cut' paper, you are using the potential form of kiru. If the paper 'is cut' or a rope 'breaks', you are using the intransitive kireru. This nuance is vital for achieving natural-sounding Japanese fluency.

Mastering the usage of 切れる (kireru) requires a solid grasp of its intransitive nature. Unlike the transitive kiru, which requires an object and the particle wo, kireru focuses on the state of the subject itself. Usually, the subject is marked with ga. For example, if a thread breaks, the thread is the focus: 'Ito ga kireru'. You aren't saying who broke it; you are simply stating the fact that it is now in two pieces. This 'state-oriented' perspective is a hallmark of Japanese grammar, and kireru is a prime example of it in action.

Conjugation Basics

As a Ichidan (Group 2) verb, conjugation is straightforward. The dictionary form is kireru, the polite form is kiremasu, the negative is kirenai, and the past tense is kireta. For the 'te-form', used for connecting sentences or expressing an ongoing state, it becomes kirete.

One of the most common sentence patterns involving kireru is the 'A ga kirete iru' pattern. This describes a current state of being 'run out' or 'broken'. If you walk into a store and they are out of stock, or if you look at your phone and the battery is dead, you use the te-iru form to indicate that the 'cutting' happened in the past and the resulting state continues now. This is slightly different from the simple past kireta, which focuses more on the moment the break or depletion occurred. Understanding this distinction helps in conveying precise meaning in daily conversations.

Temporal Usage

When talking about time limits, you might say 'Jikan ga kireta' (Time's up). This is commonly heard in exams, games, or cooking. Similarly, 'Kigen ga kireru' is used for expiration dates on food or official documents like passports.

Another elegant use of the word is found in describing connections. 'Denwa ga kireru' means the phone call was disconnected or cut off. 'Kaze ga kireru' can describe the wind cutting through something, though this is more literary. In a more psychological sense, 'Engi ga kireru' means a relationship or bond has been severed. These uses highlight how kireru moves from the tangible world of strings and knives into the intangible world of human relations and abstract concepts. Always remember: if it was once a continuous line—be it a rope, a conversation, a supply chain, or a period of time—and that line has been broken, kireru is likely your verb of choice.

You will encounter 切れる (kireru) in a vast array of real-world Japanese contexts, ranging from the mundane aisles of a supermarket to the high-pressure environment of a corporate boardroom. In a retail setting, shop assistants might apologize by saying 'Zaiko ga kirete orimasu' (We are currently out of stock). This is a polite, humble way to inform a customer that the 'flow' of the product has been interrupted. Similarly, in a kitchen or a restaurant, a chef might remark that a knife 'yoku kireru' (cuts well), which is the highest praise for the tool's sharpness and efficiency. This physical sense of sharpness is the root from which all other meanings grow.

In the Tech World

Modern life is full of things that 'run out'. You will hear 'Wi-Fi ga kireta' when the connection drops, or 'Battery ga kire-sou' when your phone is at 1%. It describes the sudden loss of power or signal perfectly.

In social and entertainment contexts, kireru takes on a more dramatic tone. In anime or TV dramas, characters often 'snap' (kireru) when pushed too far by an antagonist. The word 'bukki-gire' or 'gachi-gire' are slang terms for being 'seriously pissed off'. On the flip side, in a business context, a manager might be described as 'atama ga kireru' (sharp-minded). This isn't just about being smart; it's about being able to make decisive 'cuts' through information to reach a conclusion. It is a highly respected attribute in Japanese professional culture, suggesting efficiency and precision.

In the Kitchen

When ingredients like milk (miruku) or sugar (sato) run out mid-recipe, 'kireta' is the standard way to announce the shortage to the household.

Even in the realm of transportation, kireru appears. A driver might say 'Gasorin ga kiresou' (I'm about to run out of gas). In every instance, the common thread is the cessation of a supply or the reaching of a limit. Whether it is physical, temporal, or emotional, kireru marks the point where 'more' is no longer available. Paying attention to these contexts will help you realize just how pervasive and essential this verb is for navigating daily life in Japan.

One of the most frequent stumbling blocks for English speakers learning Japanese is the confusion between the transitive verb 切る (kiru) and the intransitive verb 切れる (kireru). In English, 'to cut' can be used both ways: 'I cut the bread' (transitive) and 'The bread cuts easily' (intransitive-ish). In Japanese, these roles are strictly separated. If you say 'Kami wo kireru', you are making a grammatical error; it should be 'Kami wo kiru' (I cut paper) or 'Kami ga kireru' (The paper is cut/breaks). Mixing up the particles ga and wo with these two verbs is a classic beginner mistake that can lead to confusion about who is doing what to whom.

The Potential Form Trap

Because kireru is also the potential form of kiru (meaning 'can cut'), learners often get confused. 'Kono knife wa yoku kireru' means 'This knife cuts well' (intransitive). But 'Watashi wa kami ga kireru' means 'I can cut paper' (potential). Context is your only guide here.

Another common error involves the misuse of kireru when referring to people. While 'atama ga kireru' is a compliment for being smart, and 'kireta' is used for getting angry, you should never use kireru to mean a person has 'been cut' in a medical sense unless you are describing a wound opening up (like 'kizu-guchi ga kireru'). If a person is physically cut by someone else, you would use the passive form of the transitive verb: 'kirareta'. Using kireru incorrectly here might make it sound like the person's body just spontaneously snapped like a piece of rope, which is quite a gruesome and unnatural image in Japanese.

Expiration Errors

Learners sometimes try to use 'owaru' (to end) for expiration dates. While 'owaru' is understandable, 'kigen ga kireru' is the much more natural and specific idiomatic expression for things like milk, visas, or coupons.

Finally, be careful with the 'anger' meaning. It is quite strong and informal. Using it to describe your boss getting angry in a formal report would be inappropriate. In professional settings, use 'okoru' or 'o-ikari ni naru'. Kireru implies a loss of control, which can be seen as quite a negative or volatile trait depending on the context. By avoiding these common pitfalls—particle confusion, potential form mix-ups, and inappropriate register usage—you will be well on your way to using kireru like a native speaker.

Japanese is rich with verbs that describe ending, breaking, or running out, so it is vital to know where 切れる (kireru) fits in the spectrum. The most obvious comparison is with なくなる (nakunaru), which means 'to become non-existent' or 'to run out'. While they are often interchangeable, kireru suggests that a supply or a continuous line has been 'cut'. For example, if you run out of money, you usually say 'okane ga nakunatta'. If you say 'okane ga kireta', it sounds more like your immediate cash flow or budget has reached a specific cutoff point. Nakunaru is broader, while kireru is more specific to the interruption of a flow.

Kireru vs. Owaru

Owaru means 'to finish' or 'to come to an end'. Use owaru for activities like movies or classes. Use kireru for deadlines (kigen) or time limits (jikan) where the 'cutting' of time is the focus.

Kireru vs. Oreru

Oreru means 'to snap' or 'to break' specifically for long, thin objects like pencils or bones. Use kireru for flexible things like rope or thread. You 'break' a pencil (oreru), but you 'snap' a string (kireru).

When it comes to the 'anger' meaning of kireru, the closest synonym is 怒る (okoru). However, okoru is a general term for being angry, while kireru specifically describes the moment someone loses their cool or 'snaps'. Another alternative is 腹が立つ (hara ga tatsu), which literally means 'the stomach stands up' and describes the feeling of irritation or offense. Kireru is much more explosive and sudden. In a professional environment, you might use 憤慨する (fungai suru) for 'to be indignant', which is far more formal than the visceral kireru.

Kireru vs. Tsugiru

In some contexts of 'running out', tsukiru (to be exhausted) is used. Tsukiru is much more dramatic and final, often used for things like life, energy, or resources in a grand scale (un ga tsukiru - one's luck has run out).

Understanding these subtle differences allows you to choose the word that fits the 'vibe' of your situation. If you want to emphasize the sudden break of a connection or the reaching of a limit, kireru is almost always the superior choice. It carries a sense of immediacy and a definitive 'click' or 'snap' that other verbs like nakunaru or owaru lack. By comparing these similar words, you gain a deeper appreciation for the precision of the Japanese language and the specific 'cutting' nuance that kireru provides.