Where does “const” come from?

const (Middle Dutch) comes from Old Dutch kunst, from Proto-Germanic kunstiz, from Proto-Germanic kunnaną, from Proto-Indo-European ǵneh₃- — to know.

Ancestry of “const”, step by step

StepLanguageWordMeaning
1Old Dutchkunstknowledge, know-how, skill
2Proto-Germanickunstizknowledge, ability
3Proto-Germanickunnanąto know, to be familiar with, to recognise; to...
4Proto-Indo-Europeanǵneh₃-to know
Every word from Proto-Indo-European ǵneh₃- →Every word from Proto-Germanic kunnaną →Every word from Proto-Germanic kunstiz →