In the term delusion,the root delus means to:

A) cheat.
B) deal.
C) debate.
D) lie.

Delusion

A false belief firmly held despite clear or contradictory evidence, often encountered in psychiatric disorders.

Cheat

The act of behaving dishonestly or unfairly in order to gain an advantage, especially in a game, exam, or competition.

Lie

A false statement made with deliberate intent to deceive; an intentional untruth.