8 letters · 18 points in Scrabble
adjective feeling or showing gratitude
originFrom Middle English thankful, from Old English þancful, þancfull (“thoughtful, pleasing, agreeable, pleasant, thankful, grateful”), equivalent to thank + -ful. Compare Old High German undankfol (“unthankful, ungrateful”).
Etymology from Wiktionary, CC BY-SA 3.0