Where does “energy vampire” come from?

energy vampire (English) comes from English energy, from Middle French énergie, from Late Latin energia, from Ancient Greek ἐνέργεια, from Ancient Greek ἐνεργής, from Ancient Greek ἐνεργός, from Ancient Greek ἐν-, from Ancient Greek ἐν — Creates collective nouns, which refer to groups...

energy vampire (English): A device or appliance that uses electricity even while switched off

Definitions

  1. A device or appliance that uses electricity even while switched off

Ancestry of “energy vampire”, step by step

energy vampire traces back through two separate lines of ancestry.

via English energy

StepLanguageWordMeaning
1EnglishenergyThe impetus behind all motion and all activity;...
2Middle Frenchénergie
3Late Latinenergiaenergy; efficiency
4Ancient Greekἐνέργειαactivity, operation, vigour; workmanship;...
5Ancient Greekἐνεργήςactive, effective
6Ancient Greekἐνεργόςat work, active
7Ancient Greekἐν-in, within; on
8Ancient Greekἐνin, on, at; among; in, at, or during the time of
9Ancient Greekδέρμαskin, hide
10Ancient Greekγλυφήcarving, carved work; hole cut
11Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
12Proto-Indo-European-íh₂
13Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via English vampire

StepLanguageWordMeaning
1EnglishvampireA mythological undead creature said to feed on...
2Frenchvampirevampire
3GermanVampirvampire
4Serbo-Croatianvàmpīrvampire
5Proto-Slavicǫpyrьvampire
Every word from Proto-Indo-European -h₂Every word from Ancient Greek -ῐ́ᾱEvery word from Ancient Greek ἐν-