一介不取

to not even take a penny (as a bribe)

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

to introduce / to lie between / between / shell / armor

no; not so / (bound form) not; un-

to take / to get / to choose / to fetch