tricky
adj (-ier, -iest)
(a) (of work, etc) requiring skill or tact (指工作等)需要技巧或智謀的
a tricky situation, problem, decision 需慎重對待的情況、 需慎重處理的問題、 需慎重做出的決定.
(b) (of people or their actions) crafty; deceptive (指人及人的行為)詭計多端的, 欺騙的
He's a tricky fellow to do business with. 他詭計多端難以共事.