1. a feeling of gratitude and appreciation; gratefulness
. . . a basic law: the more you practice the art of thankfulness, the more you have to be thankful for.
Norman Vincent Peale, 1898 – 1993
A combination of the English verb thank, which is derived from the Anglo-Saxon verb thankian (thank) through the Middle English verb thankien of the same meaning, the English adjectival suffix -ful (full of), and the English noun-forming suffix -ness indicating a condition, quality, or state and derived from the Anglo-Saxon suffix -nes(s)/ -nis(s) through the Middle English suffix -nesse/-nisse both of the same meaning.
Thank you to Allen Ward for providing this etymology.
The goal of The Dictionary Project is to ensure that everyone will be able to enjoy the benefits of owning a dictionary.