Antonyms for the phrase "be suggestive of" include "be explicit about," "deny," "ignore," "contradict," "disprove," "disavow," and "reject." When one is suggestive, they imply or hint at something while leaving the interpretation up to the listener. To be explicit about something, on the other hand, is to state it directly and without ambiguity. Denial, ignoring, and contradicting suggest that the original implication was incorrect or false. Disproving or disavowing outrightly reject the suggestion. Depending on the context, different antonyms may be more appropriate to use to communicate the intended meaning.