cog (EN)

noun, verb

noun “cog”

1. a gear; a wheel with teeth that meshes with another
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   The old clock had many cogs inside to keep accurate time.
2. one of the teeth on a gear wheel
   A broken cog can cause the whole wheel to stop working.
3. (figurative) a person who plays a minor part in a large organization or system
   She felt like just a little cog in the company.
4. (carpentry) a projection on a beam that fits into a notch in another piece
   The builder used a cog to secure the beam in place.

verb “cog”

1. to equip something with cogs
   The mechanic cogged the gears for the new clock.
2. (of an electric motor) to move in jerky steps when not powered
   The motor cogs when you try to turn it by hand.