Where does “θερινός” come from?

θερινός (Greek) comes from Ancient Greek θερινός, from Ancient Greek θέρος, from Proto-Hellenic tʰéros, from Proto-Indo-European gʷʰéros, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.

θερινός (Greek): of or in summer

Definitions

of or in summer

Ancestry of “θερινός”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	θερινός	of or in summer
2	Ancient Greek	θέρος	heat; summer; harvest, crop
3	Proto-Hellenic	tʰéros	—
4	Proto-Indo-European	gʷʰéros	heat; warm weather
5	Proto-Indo-European	gʷʰer-	warm, hot
6	Proto-Indo-European	gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr	—

Every word from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr →Every word from Proto-Indo-European gʷʰer- →Every word from Proto-Indo-European gʷʰéros →