thoroughgoing
adj.
performed comprehensively and completely; not superficial or partial
an exhaustive study|made a thorough search|thoroughgoing research
adj.
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 thorough nuisance|a thoroughgoing villain|utter nonsense|the unadulterated truth