Discontented men stirred the crew to mutiny.

心怀不满的人煽动船员叛乱。

He has been harbouring a grudge against me.

他一直对我心怀嫉妒。

The malcontent is gunning for his supervisor.

那个心怀不满的人在伺机加害他的上司。

His ungentlemanly attempts to discredit the sale of drugs by his professional brethren would by-and-by recoil on himself.

他心怀叵测，指责同行售药品的作风，也总有一天会得到报应，自食恶果。

Don't harbor unkind thoughts.

不要心怀不轨。

Don't harbo(u)r unkind thoughts.

别心怀叵测。

Their talk was slightly malicious.

他们的谈话有点儿心怀不轨。