di-

prefix

Etymology: Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwi- Proto-Hellenic *dwi- Ancient Greek δῐ- (dĭ-)bor. English di- Borrowed from Ancient Greek δῐ- (dĭ-).

1. Alternative form of dia-: across or through, before a vowel.

   “diactinic”

   “dielectric”