Where does “During” come from?

During comes from German Dühring, from German Thüringen, from Old High German Duringa, a region whose name origin and meaning remain uncertain.

Ancestry of “During”, step by step

Step	Language	Word	Meaning
1	Middle English	during	—
2	Middle English	duren	to last
3	Old French	durer	to last
4	Latin	dūrō	—
5	Latin	dūrus	—
6	Proto-Italic	dūros	—
7	Proto-Indo-European	duh₂-ró-s	long, far
8	Proto-Indo-European	dweh₂-	far; long

During — Etymology, Origin & Word History | Etymology Explorer