reprobate (adj.) Look up reprobate at Dictionary.com
1540s, "rejected as worthless," from Late Latin reprobatus, past participle of reprobare "disapprove, reject, condemn," from Latin re- "opposite of, reversal of previous condition" + probare "prove to be worthy" (see probate). The noun is recorded from 1540s, "one rejected by God." Sense of "abandoned or unprincipled person" is from 1590s. Earliest form of the word in English was a verb, meaning "to disapprove" (early 15c.).