(p. 188) ōi that; yonder.  adv. there.  int. expressing mild regret for negligence, lapse of memory etc.; ah, ah me (ওই যা). 4)

(p. 189) ōmā expressing: surprise; fear etc. 24)

(p. 189) ōṭhabasa, ōṭhabōsa act of sitting down and standing up alternately and repeatedly (as a punishment or physical exercise). 8)

(p. 188) ōkhāna that or yonder place or region. 16)

(p. 188) ōjasbala vigorous, full of strength. 24)

(p. 188) ōgarā a variety of food cooked by boiling rice and pulse together, hotchpotch. 18)

(p. 188) ō2 that or yonder person or creature or thing, a person or creature or thing in question, he, she, it.  a. that immediately preceding, last (ও মাসে). adv. too, also, moreover (সে খাবেও); even (নামও শুনিনি).  con. and.  int. expressing; a call, recollection, amazement, pity etc.; holla, ho; ah, oh. 3)

(p. 189) ōlana1 a coming down, descent. 43)

(p. 189) ōlā2, ōlānō1 (dial.) to take down, to bring down. 46)

(p. 189) ōsāra breadth, width; also dial. variant of ওয়াড় । 57)

(p. 189) ōtaprōta diffused, pervading; inseparably mixed up; thorough. ̃ভাবে adv. inseparably, inextricably. 19)

(p. 189) ōṣadhinātha, ōṣadhipati the moon. 53)

(p. 189) ōstāda a trainer, a music-master or music-teacher; a master artist or artisan. a. skilled, expert. ওস্তাদি n. efficiency, skill, mastery; cleverness; an attempt to parade one's skill or mastery, bravado; uncalled-for act of coming forward to help; officiousness. a. pertaining to a trainer or music-master or master artist or master artisan. ওস্তাদি করা v. to try to parade one's skill or mastery; to come forward uncalled-for to help; to be officious. 59)

(p. 189) ōhō expressing: recollection, amazement, regret etc., ah.

(p. 189) ōrā ṃōṭā, ṃōrā ṃuṭā orang-utan (orang-outang), an ape originally of Sumatra and Borneo. 39)