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Feminine Vowels (E, Ö, Ü)

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Grammar Rule in 30 Seconds

Mongolian uses vowel harmony; if a word has E, Ö, or Ü, all following suffixes must also use these soft vowels.

  • Rule 1: Words containing E, Ö, or Ü are 'feminine' (soft). Example: 'дээл' (deel).
  • Rule 2: Suffixes must match the word's vowel type. Example: 'дээл-тэй' (with a deel).
  • Rule 3: Never mix hard (A, O, U) and soft (E, Ö, Ü) vowels in a single root word.
Root(E/Ö/Ü) + Suffix(E/Ö/Ü) = Harmony

Suffix Vowel Selection

Root Vowel Suffix Type Example
E
-тэй
Дээл-тэй
Ö
-тэй
Өвөл-тэй
Ü
-тэй
Үсэг-тэй
A
-тай
Аав-тай
O
-той
Охин-той
U
-тай
Ус-тай

Meanings

Feminine vowels (E, Ö, Ü) dictate the vowel quality of suffixes attached to a word, ensuring phonetic consistency.

1

Suffix Selection

Determining which vowel variant of a suffix to use.

“Дээлтэй”

“Үсэгтэй”

2

Root Consistency

Ensuring native words do not mix vowel classes.

“Ээж”

“Үхэр”

Reference Table

Reference table for Feminine Vowels (E, Ö, Ü)
Form Structure Example
Affirmative
Root(E/Ö/Ü) + Suffix(E)
Ээжтэй
Negative
Root(E/Ö/Ü) + Negative(E)
Ээжгүй
Question
Root(E/Ö/Ü) + Particle(Ü)
Ээж үү?
Plural
Root(E/Ö/Ü) + Plural(E)
Эгч нар
Possessive
Root(E/Ö/Ü) + Poss(E)
Ээж минь
Case
Root(E/Ö/Ü) + Case(E)
Ээжид

フォーマル度スペクトル

フォーマル
Би дээлтэй байна.

Би дээлтэй байна. (Daily life)

ニュートラル
Би дээлтэй.

Би дээлтэй. (Daily life)

カジュアル
Дээлтэй шүү.

Дээлтэй шүү. (Daily life)

スラング
Дээлтэй байна даа.

Дээлтэй байна даа. (Daily life)

Vowel Harmony Groups

Vowel Harmony

Feminine (Soft)

  • E E
  • Ö Ö
  • Ü Ü

Masculine (Hard)

  • A A
  • O O
  • U U

レベル別の例文

1

Энэ бол дээл.

This is a deel.

2

Би дээлтэй.

I have a deel.

3

Энэ үсэг.

This is a letter.

4

Үсэгтэй ном.

A book with letters.

1

Өдөр бүр.

Every day.

2

Өдөртэй ажил.

A day's work.

3

Энэ өвөл.

This winter.

4

Өвөлдөө хүйтэн.

It is cold in winter.

1

Тэр эгчтэйгээ явсан.

She went with her sister.

2

Үнэн үг хэлэх.

To speak the truth.

3

Өөрийнхөө номыг ав.

Take your own book.

4

Энэ үйл явдал.

This event.

1

Тэрээр өөрийн үзэл бодлоо илэрхийлэв.

He expressed his opinion.

2

Энэ бол үнэхээр чухал асуудал.

This is a truly important issue.

3

Өвөрмөц хэв маяг.

A unique style.

4

Үлгэр жишээ авах.

To take as an example.

1

Үйл явцыг бүрэн хянах.

To fully control the process.

2

Өгөгдсөн үүрэг даалгавар.

The given task.

3

Энэ бол үлэмж хэмжээний өөрчлөлт.

This is a significant change.

4

Өнөөгийн нийгмийн байдал.

The current social situation.

1

Үлэмж их өвөрмөц шинж чанарууд.

Extremely unique characteristics.

2

Өөрийгөө үл тоомсорлох.

To neglect oneself.

3

Үнэн зөв өгөгдөл.

Accurate data.

4

Өвөг дээдсийн үлдээсэн өв.

The heritage left by ancestors.

間違えやすい

Feminine Vowels (E, Ö, Ü) 対 Hard vs Soft Vowels

Learners mix them up because they don't memorize the groups.

Feminine Vowels (E, Ö, Ü) 対 Suffix Variation

Learners think there is only one way to say 'with' or 'in'.

Feminine Vowels (E, Ö, Ü) 対 Loanword Harmony

Some loanwords don't follow the rule.

よくある間違い

✗

Дээл-тай

✓

Дээл-тэй

Mixing hard suffix with soft root.
✗

Үсэг-тай

✓

Үсэг-тэй

Incorrect suffix selection.
✗

Ээж-той

✓

Ээж-тэй

Wrong vowel choice.
✗

Өвөл-тай

✓

Өвөл-тэй

Ignoring the soft vowel rule.
✗

Эгч-той

✓

Эгч-тэй

Suffix mismatch.
✗

Үйл-тай

✓

Үйл-тэй

Incorrect vowel harmony.
✗

Өдөр-той

✓

Өдөр-тэй

Wrong suffix.
✗

Энэ үйл явдал-тай

✓

Энэ үйл явдал-тай (Wait, this is hard/soft mix error)

Complex words often have mixed roots, but suffixes must follow the last syllable.
✗

Өөрийн-той

✓

Өөрийн-тэй

Suffix mismatch.
✗

Үлгэр-той

✓

Үлгэр-тэй

Incorrect vowel harmony.
✗

Үлэмж-той

✓

Үлэмж-тэй

Advanced suffix error.
✗

Өвөрмөц-той

✓

Өвөрмөц-тэй

Advanced suffix error.
✗

Үнэн зөв-той

✓

Үнэн зөв-тэй

Advanced suffix error.

文型パターン

Би ___ -тэй.

Энэ бол ___ -тэй ном.

Тэр ___ -тэй явсан.

Энэ үйл явдал ___ -тэй холбоотой.

Real World Usage

Texting constant

Дээлтэй байна уу?

Social Media very common

Өнөөдөр үнэхээр гоё өдөр.

Job Interview common

Би энэ үйл ажиллагаанд оролцох хүсэлтэй байна.

Travel common

Энэ өвөл хаашаа явах вэ?

Food Delivery occasional

Энэ хоол үнэхээр амттай байна.

Classroom constant

Үсэг бүрийг зөв бичээрэй.

💡

Listen for the rhythm

Mongolian sounds melodic because of vowel harmony. Try to mimic the 'soft' sound of words with E, Ö, Ü.
⚠️

Don't overthink loanwords

Some loanwords are exceptions. If you aren't sure, check a dictionary.
🎯

Check the last vowel

Always look at the last vowel of the root word before adding a suffix.
💬

Speak naturally

Native speakers will notice if you get the harmony wrong. Practice until it feels automatic.

Smart Tips

Always check the last vowel of the root word first.

Дээл-тай → Дээл-тэй

Identify the vowel group immediately.

Reading without thinking about harmony. → Reading and categorizing as hard or soft.

Focus on the rhythm of the word.

Stumbling over suffixes. → Flowing through the word naturally.

Double-check your suffixes for harmony.

Writing with mixed vowels. → Writing with consistent harmony.

発音

IPA: /e/, /ø/, /y/

Soft Vowel Pronunciation

E, Ö, Ü are produced with the tongue higher and more forward in the mouth.

Declarative

Би дээлтэй. ↘

Falling intonation at the end of a sentence.

暗記しよう

記憶術

Think of 'E, Ö, Ü' as the 'Soft Team'. They only play with their own kind.

視覚的連想

Imagine a soft, fluffy cloud (E, Ö, Ü) that refuses to touch the hard, sharp rocks (A, O, U).

Rhyme

E, Ö, Ü are soft and light, keep your suffixes just as bright.

Story

A little girl named 'E' goes to a party. She only invites her friends 'Ö' and 'Ü'. They have a soft party together. If a 'Hard' vowel tries to enter, they politely ask them to leave.

Word Web

ЭэжҮсэгӨвөлДээлЭгчҮйл

チャレンジ

Find 5 items in your room, label them with a sticky note, and add the '-тэй' suffix if they contain E, Ö, or Ü.

文化メモ

Vowel harmony is strictly observed in the Khalkha dialect, which is the basis for standard Mongolian.

Buryat has slightly different vowel harmony rules due to historical shifts.

Inner Mongolian dialects may show variations in how they handle loanwords.

Vowel harmony is a feature of Altaic languages, developed to ensure phonetic ease.

会話のきっかけ

“

Чи дээлтэй юу?

“

Өнөөдөр өдөр ямар байна?

“

Таны үзэл бодол ямар вэ?

“

Та үлгэр жишээ авах хүн байна уу?

日記のテーマ

Describe your favorite piece of clothing using 'дээл' or other words.
Write about your day using words with E, Ö, Ü.
Discuss a recent event in your life.
Reflect on a personal philosophy or opinion.

よくある間違い

Incorrect

正解

Incorrect

正解

Incorrect

正解

Incorrect

正解

Test Yourself

Fill in the correct suffix.

Дээл ___

✓ Correct! ✗ Not quite. Correct answer: -тэй
Root has 'э', so suffix must have 'э'.
Choose the correct word. 選択問題

Which is correct?

✓ Correct! ✗ Not quite. Correct answer: Үсэг-тэй
Root has 'ү', so suffix must have 'э'.
Fix the mistake. Error Correction

Find and fix the mistake:

Өвөл-тай

✓ Correct! ✗ Not quite. Correct answer: Өвөл-тэй
Root has 'ө', so suffix must have 'э'.
Change to plural. Sentence Transformation

Эгч (sister)

✓ Correct! ✗ Not quite. Correct answer: Эгч нар
Plural marker 'нар' is neutral.
Is this true? True False Rule

Feminine vowels are A, O, U.

✓ Correct! ✗ Not quite. Correct answer: False
Feminine vowels are E, Ö, Ü.
Complete the dialogue. Dialogue Completion

A: Дээлтэй юу? B: Тийм, ___.

✓ Correct! ✗ Not quite. Correct answer: дээлтэй
Must match the question.
Build a sentence. Sentence Building

Би / дээл / -тэй

✓ Correct! ✗ Not quite. Correct answer: Би дээлтэй
Correct suffix selection.
Match root to suffix. Match Pairs

Match each item on the left with its pair on the right:

✓ Correct! ✗ Not quite. Correct answer: -тэй, -тай, -той
Correct vowel harmony for each.

Score: /8

練習問題

8 exercises
Fill in the correct suffix.

Дээл ___

✓ Correct! ✗ Not quite. Correct answer: -тэй
Root has 'э', so suffix must have 'э'.
Choose the correct word. 選択問題

Which is correct?

✓ Correct! ✗ Not quite. Correct answer: Үсэг-тэй
Root has 'ү', so suffix must have 'э'.
Fix the mistake. Error Correction

Find and fix the mistake:

Өвөл-тай

✓ Correct! ✗ Not quite. Correct answer: Өвөл-тэй
Root has 'ө', so suffix must have 'э'.
Change to plural. Sentence Transformation

Эгч (sister)

✓ Correct! ✗ Not quite. Correct answer: Эгч нар
Plural marker 'нар' is neutral.
Is this true? True False Rule

Feminine vowels are A, O, U.

✓ Correct! ✗ Not quite. Correct answer: False
Feminine vowels are E, Ö, Ü.
Complete the dialogue. Dialogue Completion

A: Дээлтэй юу? B: Тийм, ___.

✓ Correct! ✗ Not quite. Correct answer: дээлтэй
Must match the question.
Build a sentence. Sentence Building

Би / дээл / -тэй

✓ Correct! ✗ Not quite. Correct answer: Би дээлтэй
Correct suffix selection.
Match root to suffix. Match Pairs

Match: Дээл, Ус, Охин

✓ Correct! ✗ Not quite. Correct answer: -тэй, -тай, -той
Correct vowel harmony for each.

Score: /8

よくある質問 (8)

Feminine vowels are E, Ö, and Ü. They are called 'soft' because they are produced with the tongue forward.

It ensures the language sounds melodic and consistent. It is the core of Mongolian grammar.

Most native words do, but some loanwords are exceptions.

Look at the last vowel of the root word. If it's E, Ö, or Ü, use the soft suffix.

It will sound unnatural to native speakers, like a mistake in rhythm.

Yes, the 'Hard' group (A, O, U) and the 'Neutral' group (I).

Read aloud, listen to native speakers, and do suffix drills.

It takes time, but it is very consistent once you understand the logic.

Scaffolded Practice

1

1

2

2

3

3

4

4

Mastery Progress

Needs Practice

Improving

Strong

Mastered

In Other Languages

Turkish high

Büyük Ünlü Uyumu

Turkish has 8 vowels, Mongolian has 7.

Finnish moderate

Vokaalisointu

Finnish harmony is restricted to front/back vowels.

English none

None

English suffixes do not change based on root vowels.

Japanese low

None

Japanese does not harmonize vowels.

Chinese none

None

Chinese uses tones, not vowel harmony.

Arabic none

None

Arabic relies on consonant roots.

Learning Path

Prerequisites

Previous
Masculine Vowels (A, O, U)
Next
The Neutral Vowel (I)

Related Grammar Rules

A0

Consonants and Their Sounds
A0

Diphthongs and Double Vowels
A0

Masculine Vowels (A, O, U)
A0

The Neutral Vowel (I)
A0

Rounding Harmony Rules
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