Irreproachable means so correct that no fault can be found. Irreproachable conduct, an irreproachable record, irreproachable manners.
It is stronger than good, since it says that even a critic looking hard would come away empty-handed. It attaches to conduct and record rather than to skill.
1adjectiveirreproachableSo correct that no fault can be found.
“Her conduct throughout the inquiry was irreproachable.”
irreproachable is a quality.
French irreprochable is in-, not, plus reprocher, to reproach, from Latin prope, near, by way of bringing a fault close.
Middle French
inreprochable
French
irréprochable
English, today
irreproachable
1630. Borrowed from French irréprochable, from Middle French inreprochable. See also ir + reproachable.
Etymology from Wiktionary, CC BY-SA