History and Etymology
Verb
Middle English
fillen, fullen, fellen, going back to Old English
fyllan, going back to Germanic
*fulljan- (whence also Old Frisian
fella "to fill," Old Saxon
fullian, Old High German
fullen, Old Icelandic
fylla, Gothic
fulljan), weak verb derivative from the stem of
*fulla- full entry 1Noun
(sense 1) Middle English
fille, fulle, felle, going back to Old English
fyllu, fyll, going back to Germanic
*full-īn- (whence also Middle Dutch
volle "full supply, fill," Old High German
fullī, follī, Old Icelandic
fylli, Gothic
ufarfullei "superfluity"), from
*fulla- full entry 1 +
*-īn-, noun suffix of quality; (sense 2) derivative of
fill entry 1NOTE: As with other nouns originally formed with the suffix *-īn-, Old English has reclassed the nouns as regular *-ō feminine nouns by association with the suffix *-iþō.