The antonyms for the word "acuate" are blunt, dull, obtuse, and round. These words describe the opposite of a sharp or pointed object, shape, or sensation. For example, a dull knife, blunt pencil, or round tip do not have an acute edge, and therefore are not as effective. In terms of perception, obtuse means not very sharp-witted or insightful. Antonyms like these are integral to understanding the nuances of language and communication. Vocabulary is a vital tool that allows us to express ourselves with clarity and precision, and knowing antonyms can help us to paint a fuller picture of what we mean to say.