- detestable (adj.)
- early 15c., from Middle French détestable (14c.), from Latin detestabilis "execrable, abominable," from detestari (see detest). Related: Detestably.
- incontestable (adj.)
- 1670s, from French incontestable, from in- "not" (see in- (1)) + contestable (see contest (v.)). Related: Incontestably.