To Exhale

1. (intransitive) To expel air from the lungs through the nose or mouth by action of the diaphragm, to breathe out.
2. (transitive) To expel (something, such as tobacco smoke) from the lungs by action of the diaphragm.
3. (intransitive) To pass off in the form of vapour; to emerge.
4. (transitive) To emit (a vapour, an odour, etc.).
5. (transitive) To draw out; to cause to be emitted in vapor.

(breathe out (intransitive)): outbreathe, breathe out, expire (archaic)

(expel (transitive)): outbreathe, breathe out, expire (archaic)

(expel (transitive)): inbreathe, breathe in, inhale

(breathe out (intransitive)): inbreathe, breathe in, inspire