[1580–90; vaunt + -ful]This word is first recorded in the period 1580–90. Other words that entered Englishat around the same time include: academic, bomb, mandarin, motor, piggyback-ful is a suffix meaning “full of,” “characterized by” (shameful; beautiful; careful; thoughtful); “tending to,” “able to” (wakeful; harmful); or “as much as will fill” (spoonful)