cog

Noun
  1. A subordinate who performs an important but routine function (synset 109953795)
    "he was a small cog in a large machine"
  2. Tooth on the rim of gear wheel (synset 103068939)
Verb
  1. Roll steel ingots (synset 201394114)
  2. Join pieces of wood with cogs (synset 201296521)

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