The correct meaning for the word "feinted" in this context is "faked." To determine the meaning of a word, you can rely on the context of the sentence. In this case, the sentence describes how the boxer used a strategy to trick his opponent by pretending to attack with his right hand, but then actually striking with his left hook. Feinting typically involves making a deceptive or misleading movement to misdirect someone.
The correct meaning for the word "feinted" in this sentence is faked.