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.