old sweat

(Brit infml 口) person (esp a soldier) with many years' experience 经验丰富的人; （尤指）老兵.

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 maid, old man, old man's beard, old master, old school, old stager, old woman, old-fashioned, old-maidish, old-time, old-timer, old-world, olden, oldie, oldish, oldster, oleaginous, oleander, olfaction, olfactory, oligarch, oligarchy, olive, olive oil, olive-branch, Olympiad,