exhale (v.) Look up exhale at Dictionary.com
c. 1400, transitive, originally of liquids, perfumes, etc., from Middle French exhaler (14c.), from Latin exhalare "breathe out, evaporate," from ex "out" (see ex-) + halare "breathe." Of living things, "to breathe out," 1580s transitive; 1863 intransitive. Related: Exhaled; exhaling.