- clog (n.)
- early 14c., clogge "a lump of wood," origin unknown. Also used in Middle English of large pieces of jewelry and large testicles. The sense of "wooden-soled shoe" is first recorded late 14c., probably originally meaning the wooden sole itself.
- clog (v.)
- late 14c., "hinder," originally by fastening a block of wood to something, from clog (n.). Meaning "choke up" is 17c. Related: Clogged; clogging.