z 10 e 1 s 1 t 1 f 4 u 1 l 1
7 letters · 19 points in Scrabble
Meaning
adjective marked by spirited enjoyment
originFrom zest + -ful (suffix forming adjectives from nouns, with the sense of being full of, tending to, or thoroughly possessing the quality expressed by the noun).
Etymology from Wiktionary, CC BY-SA 3.0