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power assist

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noun
  1. a procedure for supplementing or replacing the manual effort needed to operate a device or system, often by hydraulic, electrical, or mechanical means.
Related formspow·er-as·sist·ed, pow·er-as·sist, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for power-assisted

power-assisted

adjective
  1. (of the steering or brakes in a motor vehicle) helped by mechanical power
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012