The antonyms for the phrase "are use" are quite varied and context-dependent. For example, if the phrase is used to describe an object or appliance that is operational, the antonyms could be "out of order," "broken," "defective," or "nonfunctional." In the case of describing an action or process as being useful, the antonyms could be "harmful," "unhelpful," "unproductive," or "ineffective." Similarly, if the phrase is used to describe a person or object being utilized or employed, the antonyms could be "idle," "unused," "neglected," or "abandoned." In general, the opposite of "are use" will depend on the specific context and the intended meaning.