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c.1400, from Middle French exhaler (14c.), from Latin exhalare "breathe out, evaporate," from ex- "out" (see ex-) + halare "breathe." Related: Exhaled; exhaling.
exhale ex·hale (ěks-hāl', ěk-sāl')v. ex·haled, ex·hal·ing, ex·hales
To breathe out.
To emit a gas, vapor, or odor.