Meaning

noun an insulating liner in an opening through which conductors pass

noun a cylindrical metal lining used to reduce friction

verb provide with a bushing

originEtymology tree English bush Proto-Germanic *-ungō Old English -ung Middle English -ynge English -ing English bushing From bush (“metal lining of the axle hole of a wheel or touch hole of a gun”) + -ing.

Etymology from Wiktionary, CC BY-SA 3.0