WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / U / unthankful unthankful adjective /ənθæŋkfəl/ 3 syllables 10 letters Scrabble 20 WWF 24 Definitions adjective not feeling or showing gratitude thanklessungrateful Look “unthankful” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →