Where does “subglazial” come from?

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

subglazial (German): subglacial

Definitions

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

subglazial — Etymology, Origin & Word History | Etymology Explorer