enjoying, engaged in, competition

willing to oppose

showing skill in trickery of the deceit

clever, scheming

(showing) ability to deceive easily

devious

a kind of seafish, often large and dangerous; a person who cheats to get money

clever, intelligent

having or showing, judgement and common sense; likely to be correct or effective

clever, intelligent

having lost natural simplicity through education or because of experience from high social living; having the latest design, methods etc (and sometimes suggesting it is complicated or needs a lot of effort)

cosmopolitan, cultured

cunning (the usual word)

crafty, clever