Definitions for "Thoroughgoing"
Keywords:  arrant, coward, stark, folly, villain
without qualification; used informally as (often pejorative) intensifiers; "an arrant fool"; "a complete coward"; "a consummate fool"; "a double-dyed villain"; "gross negligence"; "a perfect idiot"; "pure folly"; "what a sodding mess"; "stark staring mad"; "a thoroughgoing villain"; "utter nonsense"
Going all lengths; extreme; thoroughplaced; -- less common in this sense.
very thorough; exhaustively complete; "an exhaustive study"; "made a thorough search"; "thoroughgoing research"
Keywords:  bottom, going, complete, end
Going through, or to the end or bottom; very thorough; complete.