Etymology
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supercharge (v.)

1919, originally of internal combustion engines, from super- + charge (v.). Related: Supercharged (1876); supercharger; supercharging.

updated on December 29, 2013

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Definitions of supercharge from WordNet

supercharge (v.)
increase or raise;
Synonyms: boost / advance
supercharge (v.)
increase the pressure on a gas or liquid;
Synonyms: pressurize / pressurise
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.