Where does “interglazial” come from?

interglazial (German) comes from German glazial, from French glacial, from Latin glaciālis, from Latin -ālis, from Proto-Italic -ālis.

interglazial (German): interglacial

Definitions

interglacial

Ancestry of “interglazial”, step by step

Step	Language	Word	Meaning
1	German	glazial	glacial
2	French	glacial	glacial
3	Latin	glaciālis	—
4	Latin	-ālis	—
5	Proto-Italic	-ālis	—

Every word from Proto-Italic -ālis →

interglazial — Etymology, Origin & Word History | Etymology Explorer