ơ

• (Hà Nội) IPA^(key): [ʔəː˧˧]
• (Huế) IPA^(key): [ʔəː˧˧]
• (Hồ Chí Minh City) IPA^(key): [ʔəː˧˧]

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

ơ (lower case, upper case Ơ)

1. The 19th letter of the Vietnamese alphabet, preceded by Ô and followed by P, and representing /ɤ/.
   • level tone: ơ
   • high rising: ớ
   • low: ờ
   • dipping-rising: ở
   • high rising glottalized: ỡ
   • low glottalized: ợ

• ơ on Wikipedia.Wikipedia
• (Latin script):  Aa  Bb  Cc  Dd  Ee  Ff  Gg  Hh  Ii  Jj  Kk  Ll  Mm  Nn  Oo  Pp  Qq  Rr  Sſs  Tt  Uu  Vv  Ww  Xx  Yy  Zz
• (Variations of letter O):  Óó  Òò  Ŏŏ  Ôô  Ốố  Ồồ  Ỗỗ  Ổổ  Ǒǒ  Öö  Ȫȫ  Őő  Õõ  Ṍṍ  Ṏṏ  Ȭȭ  Ȯȯ  Ȱȱ  Øø  Ǿǿ  Ǫǫ  Ǭǭ  Ōō  Ṓṓ  Ō̂ō̂  Ṑṑ  Ỏỏ  Ȍȍ  Ȏȏ  Ơơ  Ớớ  Ờờ  Ỡỡ  Ởở  Ợợ  Ọọ  Ộộ  Ɵɵ  ⱺ  ᴏ  Ｏｏ  Ꜵꜵ  Œœ  Ꝏꝏ  Ꝍꝍ  Ȣȣ
• (Letters using horn sign):  Ơơ  Ờờ  Ớớ  Ởở  Ỡỡ  Ợợ  Ưư  Ừừ  Ứứ  Ửử  Ữữ  Ựự

ơ

1. The name of the Latin-script letter Ơ.

   "O" tròn như quả trứng gà
   "Ô" thời/thì đội mũ, "ơ" thời/thì mang râu

   "O" is round like an egg
   "Ô" wears a hat, and "ơ" has a beard

Borrowed from French e.

ơ

1. (dated) The name of the Latin-script letter E.

   Synonym: e

   chữ "ơ"

   the letter "ee"

   điểm "ơ"

   point "ee"

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

ơ

1. oh (an expression of surprise)

   Ơ, sao lại thế? ― Oh, why is that?

   Ơ... thằng này láo nhỉ! ― Oh … this guy is a liar!