Where does “эне́ргия” come from?

эне́ргия (Russian) comes from German Energie, from Ancient Greek ἐνέργειᾰ.

Ancestry of “эне́ргия”, step by step

Step	Language	Word	Meaning
1	German	Energie	energy
2	Ancient Greek	ἐνέργειᾰ	—

эне́ргия — Etymology, Origin & Word History | Etymology Explorer