Where does “thank” come from?

thank (Middle English) comes from Old English þanc, from Proto-Germanic þankaz, from Proto-Indo-European teng- — to think.

Ancestry of “thank”, step by step

StepLanguageWordMeaning
1Old Englishþancthanks; thought
2Proto-Germanicþankazthought; mind; consideration; remembrance;...
3Proto-Indo-Europeanteng-to think

Words derived from “thank”

Every word from Proto-Indo-European teng- →Every word from Proto-Germanic þankaz →Every word from Old English þanc →
thank — Etymology, Origin & Word History | Etymology Explorer