cog
The origin and history of cog.
Etymology
From Middle English cogge, probably from Old Norse, related to a word for a lump or swelling — the sense of "gear tooth" likely comes from the tooth's rounded shape.
The origin and history of cog.
From Middle English cogge, probably from Old Norse, related to a word for a lump or swelling — the sense of "gear tooth" likely comes from the tooth's rounded shape.