THOROUGH

I. preposition Etymology: Middle English thorow, from Old English thurh, thuruh, preposition & adverb Date: before 12th century through , II. adverb Date: before 12th century through , III. adjective Date: 15th century carried through to completion ; exhaustive , 2. marked by full detail , careful about detail ; painstaking , complete in all respects , having full mastery (as of an art) , ~ly adverb ~ness noun