Where does “mistru” come from?

mistru (Norwegian Nynorsk) comes from Norwegian Nynorsk tru, from Old Norse trú, from Middle Low German truwe, from Old Saxon treuwa, from Proto-Germanic trewwō, from Proto-Indo-European drewo-.

mistru (Norwegian Nynorsk): disbelief

Definitions

disbelief

Ancestry of “mistru”, step by step

Step	Language	Word	Meaning
1	Norwegian Nynorsk	tru	belief, faith; trust, confidence; to think,...
2	Old Norse	trú	faith; inflection of trúr: ## positive degree...
3	Middle Low German	truwe	—
4	Old Saxon	treuwa	—
5	Proto-Germanic	trewwō	fidelity, pledge
6	Proto-Indo-European	drewo-	—

Every word from Proto-Indo-European drewo- →Every word from Proto-Germanic trewwō →Every word from Old Saxon treuwa →