Blocked up or filled with something so that material cannot flow or move through freely.
From Middle English 'cloggen,' possibly from Old Norse 'klagi' meaning 'wedge.' The word originally meant to impede movement, and evolved to mean blocked or obstructed.
Your arteries getting clogged is basically the same concept as your sink clogging—buildup prevents flow, which is why doctors use the same warning language for both plumbing and health!
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