Inbreathe refers to the act of breathing in. The opposite of inbreathe is outbreathe, which means to exhale or breathe out. Other antonyms for inbreathe include exhale, expel, and emit. These words refer to the process of expelling air or anything else from the body or a container. Other antonyms for inbreathe include suck, inhale, and inspire. These words refer to the process of taking in air or something else into the body or a container. Inbreathe is an important process that helps us to survive, while its antonyms help us to release unwanted substances from our body and containers.