köken: Inherited from Middle French sourd, from Old French sourt, sord, surt, surz, from Latin surdus, from Proto-Indo-European *swer- (“ringing, whistling”).
aile: assourdir, faire la sourde oreille, sourd comme un pot, sourdement, sourdingue
köken: Possibly a blend of vaisu + laimea or vaieta + laimea (in the latter case perhaps through the verb vaimeta or vaimentaa, in which case vaimea is a secondary back-formation). Alternatively, according to Aikio, from the same root as vaimo, from Proto-Uralic *wajŋe (“breath”) (compare Moksha ваймамс (vajmams) and Erzya оймамс (ojmams, “to rest, calm down, breathe”)).