Definition

Verb: 1. To obstruct or make impassable: To completely fill or close a passage, entrance, or opening, preventing movement or access. 2. To seal or close off: To intentionally stop up a hole, path, or route.

Usage

The verb "block up" is used to describe the action of causing a complete obstruction. It often implies using a physical object or material to fill a space so that nothing can pass through. It is commonly used in contexts involving construction, maintenance, accidents, or deliberate barriers.

Examples

• The fallen tree blocked up the narrow road completely.
• We need to block up that old fireplace to stop the draft.
• A major accident is blocking up all southbound lanes on the highway.
• Leaves and debris had blocked up the drain, causing the flood.

Advanced Usage

• "to be/get blocked up": This passive form is frequently used to describe the state of something being obstructed, often referring to bodily passages or pipes.
  • My nose is completely blocked up because of this cold.
  • The kitchen sink is blocked up again.

Variants and Related Words

• Block (verb): A more general term for obstructing or hindering passage or progress. ("Block the door.")
• Blockage (noun): The state of being blocked or the thing that causes the block. ("There is a blockage in the pipe.")
• Clog (verb): To block or become blocked with an accumulation of thick, sticky matter. Often used for pipes and filters. ("Hair clogged the drain.")

Synonyms

• Obstruct: To be in the way of or hinder.
• Barricade: To block or defend with a barrier.
• Choke: To block a passage, especially by compression or crowding.
• Plug: To fill or close a hole tightly with an object.
• Seal: To close something securely to prevent entry or escape.

Related Phrasal Verbs

• Block off: To prevent access to an area by placing a barrier. This often implies a temporary or official closure.
  • The police blocked off the street after the robbery.
• Block in: To park a vehicle so closely to another that it cannot move out.
  • Someone blocked me in; I can't get my car out of the parking space.

Related Idioms

• "Like trying to get blood from a stone": While not directly using "block up," this idiom describes a futile effort, similar to the frustration of something being completely blocked or unyielding.

Verb

1. render unsuitable for passage
   • block the way
   • barricade the streets
   • stop the busy road