English Reference
verb · noun

clog

v. · n.
US /ˈkɫɑɡ/ UK /klˈɒɡ/ clog UK spelling clog's, clog's, clogging

  1. 01 B1 Intermediate

    v.to block a pipe, road, or opening so that nothing can get through.

    v.to obstruct or hinder passage through a channel, pipe, or opening, often by an accumulation of material.

    Simple

    Hair and soap can easily clog the shower drain if you are not careful.

    In context

    The narrow arterial roads were quickly clogged by heavy snow, bringing the city's entire transport network to a standstill within hours.

  2. 02 C1 Advanced Literary

    v.to make it difficult for someone to move or act by giving them too much to carry or do.

    v.to encumber or hamper movement or progress; to load with something that impedes efficiency.

    Simple

    The new rules clog the system and make it harder for small businesses.

    In context

    The legal proceedings were clogged by endless bureaucratic delays, preventing the plaintiff from reaching a resolution for several years.

  3. 03 C2 Proficiency TechnicalFormal Law

    v.to prevent a borrower from getting their property back after paying a debt.

    v.to enforce a lender's right that prevents a borrower from exercising their equitable right to redeem a mortgage.

    Simple

    The court ruled that the contract was an illegal clog on the borrower's rights.

    In context

    The judge determined that the option to purchase the property constituted a clog on the equity of redemption and was therefore void.

    Usage

    Usually appears in the phrase 'clog on the equity of redemption'.

    restrictfetter
  4. 04 B2 Upper Intermediate

    n.something that blocks a pipe or a tube.

    n.a physical obstruction or accumulation of material that prevents flow.

    Simple

    The plumber had to use a special tool to remove a stubborn clog in the pipes.

    In context

    A significant clog in the cooling system caused the engine to overheat during the long journey across the desert.

  5. 05 B1 Intermediate

    n.a shoe made entirely or mostly of wood.

    n.a type of footwear with a thick, typically wooden sole, often associated with traditional European folk dress.

    Simple

    In the souvenir shop, they sold tiny painted clogs from the Netherlands.

    In context

    The rhythmic sound of wooden clogs on the cobblestone streets echoed through the village during the traditional festival.

    sabat

Other retail reviews detailed similar pump issues – the component clogs easily and it’s difficult to get to the product at the bottom of the bottle.

The Guardian· 29 Aug 2026

Granted, its window closed before the new campaign gets under way and they didn’t have a World Cup clogging up the summer this year.

The Guardian· 4 Sept 2026

Unknown; perhaps from Middle English clog (“weight attached to the leg of an animal to impede movement”). Perhaps of North Germanic origin and derived from Proto-Germanic *klumpô (“lump, mass, clasp”); compare Old Norse klugu, klogo (“knotty tree log”), Dutch klomp.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin non klugu
Level C1 · Advanced
Frequency Occasional
Updated