If a piece of work or problem is tricky, it is difficult to deal with and needs careful attention or skill.

It's tricky to learn to ride a skateboard, but you never forget how. 学习滑板挺难的，但是一旦学会就不会忘记。

I'm in a tricky situation - whatever I do I'll offend someone. 我的处境真有点儿难办——我无论怎么做都会得罪人。

likely to deceive people

He's a tricky one. 他是一个诡计多端的人。