English
exoenergic
From exo- + energic.
Proto-Indo-European *h₁eǵʰs ‘out of’
Proto-Hellenic *eks
Ancient Greek ἐκ ‘Out of, from’
Ancient Greek ἔξω ‘outer’
English exo-
Today it means
adj That releases energy; exothermic
Language periods are conventional ranges, not dates for this word.
Etymograph / exoenergic