animalyoudaoicibaDictYouDict
animal: [14] Etymologically, an animal is a being which breathes (compare DEER). Its immediate source was the Latin adjective animālis ‘having a soul’, a derivative of the noun anima ‘breath, soul’ (which also gave English the verb and adjective animate [15]). Anima is a member of a set of related words in which the notions of ‘breath, wind’ and ‘spirit, life’ are intimately connected: for instance, Greek ánemos ‘wind’ (possible source of English anemone), Latin animus ‘spirit, mind, courage, anger’ (source of English animosity [15] and animus [19]), Sanskrit ániti ‘breathe’, Old English ōthian ‘breathe’, Swedish anda ‘breath, spirit’, and Gothic usanan ‘breathe out’.

The ‘breath’ sense is presumably primary, the ‘spirit, life’ sense a metaphorical extension of it.

=> anemone, animate, animosity, animus
exhalation (n.)youdaoicibaDictYouDict
late 14c., "act of exhalation; that which is exhaled," from Latin exhalationem (nominative exhalatio) "an exhalation, vapor," noun of action from past participle stem of exhalare "to breathe out" (see exhale).
exhale (v.)youdaoicibaDictYouDict
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.
expiration (n.)youdaoicibaDictYouDict
early 15c., "vapor, breath," from Middle French expiration, from Latin expirationem/exspirationem (nominative expiratio/exspiratio) "a breathing out, exhalation," noun of action from past participle stem of expirare/exspirare "breathe out; breathe one's last" (see expire). Meaning "termination, end, close" is from 1560s.
expire (v.)youdaoicibaDictYouDict
c. 1400, "to die," from Old French expirer "expire, elapse" (12c.), from Latin expirare/exspirare "breathe out, blow out, exhale; breathe one's last, die," hence, figuratively, "expire, come to an end, cease," from ex- "out" (see ex-) + spirare "to breathe" (see spirit (n.)). "Die" is the older sense in English; that of "breathe out" is first attested 1580s. Of laws, patents, treaties, etc., mid-15c. In 17c. also transitive. Related: Expired; expiring.