Where does “tví-” come from?

tví- (Icelandic) comes from Indo-European *dwi-.

tví- (Icelandic): two, double, binary

Definitions

two, double, binary

Ancestry of “tví-”, step by step

Step	Language	Word	Meaning
1	Indo-European	*dwi-	—

Words derived from “tví-”

Every word from Indo-European *dwi- →

tví- — Etymology, Origin & Word History | Etymology Explorer