As adjectives the difference between conniving and cunning
is that conniving is that connives; conspiratorial while cunning is sly; crafty; clever in surreptitious behaviour.
What do you call a conniving person?
Synonyms. scheming. a cold, scheming villain. designing. the wily cunning of a designing hypocrite.
What does conniving liar mean?
cooperating secretly, especially with harmful or evil intent; conspiring: a conniving liar and thief.