Thus go they both together to their gear.
Spenser.
8. (Mech.) (a) A toothed wheel, or cogwheel; as, a spur gear, or a
bevel gear; also, toothed wheels, collectively. (b) An apparatus for
performing a special function; gearing; as, the feed gear of a lathe.
(c) Engagement of parts with each other; as, in gear; out of gear.