old maid

(infml derog 口, 贬) unmarried woman who is thought to be too old for marriage 老小姐; 老处女.

oily, ointment, okapi, okay, okay (also OK), okey, okra, old, old age, old boy, old boy (fem 阴性作 `old girl), Old English, old fogey (US old fogy), old folk, old folks' home, old girl, Old Glory, Old Harry (also Old Nick, Old Scratch), old lady, old lag, old man, old man's beard, old master, old school, old stager, old sweat, old woman, old-fashioned, old-maidish, old-time, old-timer, old-world, olden, oldie, oldish, oldster, oleaginous, oleander, olfaction, olfactory,