Capable of being avowed or openly declared; acceptable or defensible to acknowledge openly.
Formed from 'avow' plus the suffix '-able' meaning 'capable of being,' this adjective was created to describe things that could be righteously claimed or admitted.
The existence of 'avowable' versus 'unavowable' reflects a medieval and Renaissance concern with honor and reputation—what could you openly claim in polite society versus what had to be hidden?
Complete word intelligence in one call. Free tier — 50 lookups/day.