From Old English 'fyllan' (to make full), from PIE *pleh₁- — the root behind 'full,' 'plenty,' and 'plus.'
To make or become completely full.
From Old English 'fyllan' (to fill, replenish), from Proto-Germanic *fulljaną (to make full), from *fullaz (full), from PIE *pleh₁- (to fill). Key roots: *pleh₁- (PIE: "to fill").