Where does “te-” come from?

te- (Old Dutch) comes from Proto-Germanic twiz-, from Proto-Indo-European dwis- — two-ways, in twain; twice, in two.

Ancestry of “te-”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	twiz-	in two, in twain; asunder, in pieces; apart,...
2	Proto-Indo-European	dwis-	two-ways, in twain; twice, in two

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