In-audible, meaning unable to be heard, has several antonyms. The first antonym is audible, which means capable of being heard. Other antonyms include loud, clear, distinct, and discernible. Loud refers to a sound that is very audible or easily heard, while distinct implies that the sound can be differentiated from other sounds. Discernible means that something can be perceived or understood clearly. Other antonyms for in-audible include noticeable, conspicuous, and evident, all of which indicate that something can be easily perceived by the senses. In general, antonyms for in-audible include any words that suggest that a sound is loud, clear, and easily heard.