Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

Old English þancian "to give thanks," from Proto-Germanic *thankojan (cf. Old Saxon thancon, Old Norse þakka, Danish takke, Old Frisian thankia, Middle Dutch, German danken "to thank"), from *thankoz "thought, gratitude," from PIE root *tong- "to think, feel." For sense evolution, cf. related Old English noun þanc, þonc, originally "thought," but by c.1000 "good thoughts, gratitude." The whole group is from the same root as think (q.v.). In ironical use, "to blame," from 1550s. To thank (someone) for nothing is recorded from 1703. Related: Thanked; thanking.

MORE RELATED WORDS FOR UNTHANKING

unappreciative

adjectivethankless
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.