MW→aboard

aboard

EnglishMerriam-Webster Dictionary

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a mechanism that performs a specific function in a complete machine //steering gear

a toothed wheel

working relation, position, order, or adjustment //got her career in gear

a level or pace of functioning //kicked their performance into high gear

one of two or more adjustments of a transmission (as of a bicycle or motor vehicle) that determine mechanical advantage, relative speed, and direction of travel

verb

geared; gearing; gears

Definition (Entry 2 of 2)

transitive verb
to provide (machinery) with gearing (see gearing sense 2)
to connect by gearing (see gearing sense 1)
to make ready for effective operation
to adjust so as to match, blend with, or satisfy something //gearing wages to productivity
intransitive verb
British, of machinery to be in gear mesh

aboard — MW · Shobdo