Answer:
Negate could have several meanings, but the one meaning I think it is, is: Negative or subtract, but like used for a question.
Step-by-step explanation:
Here let me give you an example, say you're talking to your math teacher, right? Then she says, you forgot to negate 18 from 35. Then she tells you to go back.
It could also be something like this. "DID YOU TAKE MY BRACLET??" Sister asks. "Negate, I would never touch that silly bracelet of yours."