Morpheme
di(a)- [di-, dia-]
Type
prefix
Denotation
through, throughout, in different directions, between, also often merely intensive, thoroughly, entirely
Etymology
Ancient Greek diá
Evidence
diagnosis, diagram, dialect, dialogue, dialysis, diameter, diameter, diaper, diaphanous, diatom, diatomaceous, dielectric, dieresis, diocese, diorama, diuretic, epidiascope, hendiadys
Notes
di- usual form before vowels
dia- usual form before consonants