The antonyms for the phrase "have try" are several, and they largely depend on the context. For instance, if "have try" alludes to the expression "give it a try," then the antonym is "don't try." Likewise, when "have try" refers to the attempt, the antonyms would be "drop," "give up," or "quit." If the phrase is used to imply ownership or possession, the antonyms would be "let go of," "lose," or "lack." In any case, having antonyms for a given word or phrase grants flexibility when trying to convey a message precisely.