[syn: arrant(a), complete(a), consummate(a), double-dyed(a), everlasting(a), gross(a), perfect(a), pure(a), sodding(a), stark(a), staring(a), thoroughgoing(a), utter(a), unadulterated]
The Collaborative International Dictionary of English v.0.48:
Thoroughgoing \Thor"ough*go`ing\, a.
   1. Going through, or to the end or bottom; very thorough;
      complete.
      [1913 Webster]
   2. Going all lengths; extreme; thoroughplaced; -- less common
      in this sense.
      [1913 Webster]
WordNet (r) 3.0 (2006):
thoroughgoing
    adj 1: performed comprehensively and completely; "an exhaustive
           study"; "made a thorough search"; "thoroughgoing
           research" [syn: exhaustive, thorough,
           thoroughgoing]
    2: 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"; "the unadulterated truth" [syn: arrant(a),
       complete(a), consummate(a), double-dyed(a),
       everlasting(a), gross(a), perfect(a), pure(a),
       sodding(a), stark(a), staring(a), thoroughgoing(a),
       utter(a), unadulterated]