Where does “hidrotermal” come from?
hidrotermal (Spanish) comes from French hydrothermal, from French thermal, from New Latin thermalis, from Ancient Greek Θέρμη, from Proto-Indo-European gʷʰer-, from Proto-Indo-European gʷʰe-gʷʰór-e ~ gʷʰe-gʷʰr-ḗr.
hidrotermal (Spanish): hydrothermal
Ancestry of “hidrotermal”, step by step