unclog
C1Informal, occasionally technical (e.g., plumbing)
Definition
Meaning
To remove a blockage or obstruction, especially from a pipe, drain, or passage.
To clear or free something that is blocked, congested, or impeded, facilitating the return of normal flow or function.
Linguistics
Semantic Notes
Primarily a transitive verb. The word implies the restoration of a previous state of flow or function by removing a physical or metaphorical clog. The agent of the action (who/what does the unclogging) can be a person, a tool (drain cleaner), or an event (the rain unclogged the gutter).
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or usage. The word is equally understood and used in both varieties. Minor differences may appear in collocating products (e.g., brand names for drain cleaners).
Connotations
Neutral/concrete in both varieties, though slightly more informal than 'clear a blockage' or 'remove an obstruction'.
Frequency
Comparably frequent in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
Subject + unclog + Direct Object (e.g., I unclogged the drain.)Direct Object + be unclogged (e.g., The pipe was finally unclogged.)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Unclog the arteries of commerce.”
Usage
Context Usage
Business
Metaphor for removing bureaucratic or procedural inefficiencies that impede workflow (e.g., 'We need to unclog the approval process').
Academic
Used in technical descriptions in medicine (cardiovascular studies) or engineering (fluid dynamics).
Everyday
Overwhelmingly used for household plumbing issues, skincare (pores), and occasional traffic metaphors.
Technical
Standard term in plumbing, drainage, and certain medical contexts (e.g., angioplasty to unclog an artery).
Examples
By Part of Speech
verb
British English
- I had to unclog the kitchen sink with a plunger.
- This chemical should unclog the foul drain.
- The council finally unclogged the storm drain after the heavy rains.
American English
- I need to unclog the bathroom sink with a snake.
- Try this cleaner to unclog the garbage disposal.
- The new policy aims to unclog the court system.
adverb
British English
- Not applicable.
American English
- Not applicable.
adjective
British English
- Not applicable as a standard adjective. 'Unclogged' is the participial adjective: 'an unclogged drain'.
American English
- Not applicable as a standard adjective. 'Unclogged' is the participial adjective: 'unclogged arteries'.
Examples
By CEFR Level
- The plumber unclogged the toilet.
- I used baking soda and vinegar to unclog the sink.
- Regular maintenance helps to unclog filters and keep the machine running efficiently.
- The facial scrub is designed to unclog pores and prevent breakouts.
- The government introduced measures to unclog the bureaucratic pipeline for new business licenses.
- Surgeons performed a procedure to unclog the patient's coronary arteries.
Learning
Memory Aids
Mnemonic
Think: 'UN-do a CLOG'. A clog is a blockage, so to unclog is to remove it.
Conceptual Metaphor
FLOW IS FREEDOM / IMPEDIMENTS ARE BLOCKAGES. Problems that stop progress are conceptualised as physical clogs that need removal.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque from 'un-' as 'раз-'. While 'разблокировать' (razblokirovat') works for digital/abstract contexts, for physical drains/pipes, 'прочистить' (prochistit') is more natural. Do not use 'открыть' (otkryt' - to open) for this specific action.
Common Mistakes
- Using 'unclog' intransitively (e.g., 'The drain unclogged' is passive in meaning; better: 'The drain got unclogged' or 'I unclogged the drain').
- Confusing with 'unplug' (to disconnect from electrical power).
Practice
Quiz
In which context is 'unclog' LEAST likely to be used?
FAQ
Frequently Asked Questions
No, it is primarily informal or technical. In formal writing, 'clear a blockage' or 'remove an obstruction' might be preferred.
Yes, metaphorically. You can unclog a process, a system, or traffic, meaning to remove impediments to flow or progress.
There is no direct, commonly used noun. You would use 'unclogging' (the act) or refer to the result as a 'cleared/unblocked' state. The problem itself is a 'clog' or 'blockage'.
They are very close synonyms. 'Unclog' often implies a denser, more stubborn, or gunk-based blockage (like in drains), while 'unblock' can be more general (a blocked road, a blocked website). In many cases, they are interchangeable.