energy

Meanings

1. 1
   noun

   The strength and ability to be active without getting tired.

   Jogging in the morning works off my excess energy.

2. 2
   noun

   Power from sources such as electricity, gas, or fuel, used to make things work.

   The country is investing in clean energy to replace coal.

3. 3
   noun

   The physical quantity that gives a system the capacity to do work, measured in joules.

   In physics, energy can change form but is never destroyed.

Appears in

Simplified etymology

Energy, recorded in the mid-16th century, ultimately derives from Greek ergon, “work.” It belongs to the same ancient word family as work and ergonomic.

Etymology tree Proto-Indo-European *h₁én Ancient Greek ἐν (en) Ancient Greek ἐν- (en-) Proto-Indo-European *werǵ- Proto-Indo-European *-om Proto-Indo-European *wérǵom Proto-Hellenic *wérgon Ancient Greek ἔργον (érgon) Proto-Indo-European *-os Proto-Hellenic *-os Ancient Greek -ος (-os) Ancient Greek ἐνεργός (energós) Proto-Indo-European *-os Proto-Indo-European *-ēs Ancient Greek -ης (-ēs) Ancient Greek -ής (-ḗs) Ancient Greek ἐνεργής (energḗs) Proto-Indo-European *-h₂ Proto-Indo-European *-ih₂der. Ancient Greek -ιᾰ (-iă) Ancient Greek ἐνέργεια (enérgeia)bor. Late Latin energīader. Middle Fren…

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External links

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• Cambridge Dictionary
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