It is the hypothetical source of/evidence for its existence is provided by: Sanskrit aniti "breathes;" Greek anemos "wind;" Latin animus "rational soul, mind, life, mental powers, consciousness, sensibility; courage, desire," anima "living being, soul, mind, disposition, passion, courage, anger, spirit, feeling;" Old Irish anal, Welsh anadl "breath," Old Irish animm "soul;" Gothic uzanan "to exhale," Old Norse anda "to breathe," Old English eðian "to breathe;" Old Church Slavonic vonja "smell, breath;" Armenian anjn "soul."
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<a href="https://www.etymonline.com/word/anemometer">Etymology of anemometer by etymonline</a>
Harper, D. (n.d.). Etymology of anemometer. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/anemometer