Where does “thackæ” come from?

thackæ (Old Danish) comes from Old Norse þakka, from Proto-Germanic þankōną, from Proto-Germanic þankaz, from Proto-Indo-European teng- — to think.

Ancestry of “thackæ”, step by step

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

Words derived from “thackæ”

Every word from Proto-Indo-European teng- →Every word from Proto-Germanic þankaz →Every word from Proto-Germanic þankōną →