wave: English has two words wave, distinct in origin, which have grown to resemble each other over the centuries. The verb, ‘move to and fro’ [OE], goes back to a prehistoric Germanic base *wab-, which also produced English waver [14] (borrowed from Old Norse vafra ‘move unsteadily’) and wobble [17]. The noun wave ‘movement of the sea’ [16] seems to be an alteration (under the influence of the verb wave) of an earlier wawe ‘wave’. This in turn probably went back to Old English wǣg ‘motion, wave’, a derivative of the verb which produced modern English wag. => waver, wobble; wag