叵测

This maneuver of his is a diabolical conspiracy.

他这一手是一个居心的大阴谋。

It is disingenuous of him to flatter me.

他对我阿谀奉承，是居心。

Don't harbo(u)r unkind thoughts.

心怀。

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

他心怀，指责同行出药品的作风，也总有一天会得到报，恶果。