This article describes two- and three-letter combinations (so-called digraphs and trigraphs) used for the Mongolian language when written in the Mongolian script.

Vowel and consonant combinations

The intervocalic letters ɣ/g, and y has in some combinations come to help form long vowels, namely:

  • Long a with: aɣa, iɣa, iya.
  • Long e with: ege, ige, iye.
  • Long i with: igi.
  • Long o with: oɣa, oɣo, uɣa.
  • Long u with: aɣu, iɣu, uɣu.
  • Long ö with: öge, üge.
  • Long ü with: egü, igü, ügü.

Sometimes intervocalic b and m is silent: as in ᠳᠡᠪᠡᠯ debel (Khalkha: дээл deel) 'robe, garment' or ᠬᠦᠮᠦᠨ kümün (Khalkha: хүн khün) 'human, person; man'.

Vowel combinations

Doubled vowels
iioouuüüTransliteration
īŏūǖPronunciation
ᠤᠤ⟨?⟩ ⟨⟩Alone
ᠣᠣ
ᠤᠤ‍ᠦᠦ‍Initial
‍ᠢᠢ‍‍ᠣᠣ‍(‍ᠦ᠋ᠦ‍)Medial
‍ᠤᠤFinal
  • The doubled vowels ii, uu, and üü mark these out as long. Doubled oo is instead both used in a few words to mark the vowel as short, and to distinguish it from u.
Diphthongs
aieioi, uiöiüiTransliteration
āēi̯ōi̯, ūi̯ǖi̯Pronunciation
ᠠᠢᠡᠢᠣᠢᠥᠢAlone
ᠠᡳ᠌‍ᠡᡳ᠌‍ᠣᡳ᠌‍ᠣᡳ᠌‍Initial
‍ᠠᡳ᠌‍‍ᠣᡳ᠌‍‍ᠦᡳ᠌‍Medial
‍ᠠᠢ‍ᠣᠢ‍ᠦᠢFinal
  • Most of the i's of these diphthongs derive from an earlier yi, but is no longer recognized as such. The yi origin can for instance be seen in the two long teeth of ᠰᠠᠶᠢᠨ⟨?⟩ sayin 'good'. These has become a pair of short and long teeth (᠊‍ᠢ᠋‍) in recent manuscripts. The diphthongs only appears with the single form of i, as in ᠳᠠᠯᠠᠢ dalai̯ 'sea', at the end of words.
Diphthongs, continued
auu‑auu‑aTransliteration
uă/uāūā?Pronunciation
ᠠᠤ‍Initial
‍ᠠᠤ‍Medial
‍ᠤ᠎ᠠ⟨?⟩ ⟨⟩‍ᠤᠤ᠎ᠠ⟨?⟩Final

Notes