當之無愧

fully deserving, without any reservations (idiom); entirely worthy (of a title, honor etc)

to be / to act as / manage / withstand / when / during / ought / should / match equally / equal / same / obstruct / just at (a time or place) / on the spot / right / just at

at or in the very same... / suitable / adequate / fitting / proper / to replace / to regard as / to think / to pawn / (coll.) to fail (a student)

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

not to have / no / none / not / to lack / un- / -less

to have a clear conscience / to feel no qualms

old variant of 愧[kui4]

ashamed