Where does “thanken” come from?

thanken (Middle English) comes from Old English þancian, from Proto-Germanic þankōną, from Proto-Germanic þankaz, from Proto-Indo-European teng- — to think.

Ancestry of “thanken”, step by step

StepLanguageWordMeaning
1Old Englishþancianto thank
2Proto-Germanicþankōnąto thank
3Proto-Germanicþankazthought; mind; consideration; remembrance;...
4Proto-Indo-Europeanteng-to think

Words derived from “thanken”

Every word from Proto-Indo-European teng- →Every word from Proto-Germanic þankaz →Every word from Proto-Germanic þankōną →
thanken — Etymology, Origin & Word History | Etymology Explorer