обо

See also: обо-

Russian

Etymology

From Proto-Slavic *o(b), from Proto-Indo-European *h₃ebʰi.

Pronunciation

• IPA^(key): [ɐbə] (no stress)

• Audio

  (file)

Preposition

обо • (obo)

1. (+ prepositional case): about, of, on

   обо мне ― obo mne ― about me

   обо всех ― obo vsex ― about everybody

2. (+ accusative case): against, upon

   обо что-нибудь ― obo što-nibudʹ ― upon something

Usage notes

The form обо is used before мне, что (and compound words beginning with чтo); also along with о before inflected forms of все, всё, весь. In most cases, use о (o) or об (ob) instead.