The predicate is the part of a sentence that includes the verb and verb phrase. The predicate of "The boys went to the zoo" is "went to the zoo."
We change the pronunciation of this noun ("PRED-uh-kit") when we turn it into a verb ("PRED-uh-kate"). The verb predicate means to require something as a condition of something else, and we use this term mostly in connection with logic, mathematics, or rhetoric. To predicate your argument on certain facts is to use those facts as evidence.