the.com/gear

A tiny toothed circle that taught humanity how to multiply force without lifting a finger.

means A toothed wheel that meshes with another to transmit motion or force — and, by extension, the equipment or clothing needed for any activity.

from From Old Norse 'gervi' or 'gørvi,' meaning equipment, gear, or apparel — brought to English by Norse settlers and related to the Old English verb 'gearwian,' to make ready or prepare. The original sense was 'whatever you need to get ready' (your kit, your harness, your tackle), and the mechanical meaning — the toothed wheel — grew later from this idea of working apparatus, a piece of the equipment that makes a machine go.

oldest
Gear trains date back over 2,000 years
antikythera
Ancient Greeks geared a hand-cranked star computer
nature's gear
A jumping insect has real meshing leg gears
golden ratio
Some gear teeth use involute curves for smoothness
slang shift
Gear means clothes, drugs, or equipment everywhere
for instance

antikythera mechanism — ancient greek geared device from ~100 bce used to predict astronomical positions

veronica mars costume — tv character known for signature outfit including messenger bag, worn by kristen bell

patek philippe nautilus — luxury watch with 40+ gears and complications, ~$100k+ retail price

peloton bike resistance system — home fitness equipment with magnetic resistance and gear-driven drivetrain, 2012+

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