English

exothermal

From exo- + thermal.

A compound of exo- + thermal

Proto-Indo-European *h₁eǵʰs ‘out of’

Proto-Hellenic *eks

Ancient Greek ἐκ ‘Out of, from’

Ancient Greek ἔξω ‘outer’

English exo-

Proto-Indo-European *gʷʰer- ‘to heat, warm’

Ancient Greek θέρμη ‘heat’

New Latin *thermalis

French thermal

Today it means

adj exothermic

Language periods are conventional ranges, not dates for this word.

Etymograph / exothermal