They thanked him profusely for his public service, apologized for Republican hectoring, and complained about decorum.
Peña Nieto later apologized and thanked those who criticized him—for exercising their democratic right to express themselves.
After winning reelection, President Obama thanked a handful of his staffers for their tireless effort during the campaign.
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.