An Etymological Dictionary of Astronomy and Astrophysics

Living in a state of nature; not tamed or domesticated (Dictionary.com).

Etymology (EN): M.E., from O.E. wilde; cognate with Du., O.H.G. wildi, Ger. wild, Sw. vild.

Etymology (PE): Towsan “wild,” cf. Av. disav- “a kind of night predator animal.”