之一

one of (sth) / one out of a multitude / one (third, quarter, percent etc)

(possessive particle, literary equivalent of 的[de5]) / him / her / it

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

one third

one fifth

to put to the torch (idiom) / to commit to the flames / to burn sth down deliberately

one seventh

one half

one ninth

to dismiss with a sigh (idiom); a hopeless case

to dismiss sth with a laugh (idiom) / to laugh it off

(idiom) to dismiss sth with a laugh; to laugh it off

either

to dismiss with a sigh (idiom); a hopeless case