こっそり の訳語→ discreetly furtively privately quietly sott-voce stealthily surreptitiously unperceived unseen
にじり寄る の訳語→ approach inch roam slide step
やつ の訳語→ anybody bloke boy chap customer fellow figure fucker guy he his man man-jack one onion puppy somebody something son-of-a-bitch son-of-a-gun stallion stuff talent thing type you
犯人 の訳語→ culprit killer murderer perpetrator villain
連中 の訳語→ all bastard bunch character contingent coterie crowd everyone folk fringe fry group lot member mind mortals observer other people personnel rabble rank run setout SOB swarm them they those variety