“+ adjective
Etymology: un- (I) + sung, past participle of sing
1. : not sung : not rendered in song
2. : not celebrated in song or verse or otherwise praised
our writers, artists, and musicians … go unsung — Cornelia O. Skinner
the creator of infiltration is the unsung prophet of the new age in warfare — S.L.A.Marshall
massed infantry to do the bloody unsung job of mopping up the enemy — Time