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Definition of monkeywrench

monkeywrench

/ˈmʌŋ.kiˌrɛntʃ/
mon · key · wrench

Plural:monkeywrenches
•
Past Simple:monkeywrenched
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Past Participle:monkeywrenched
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Present Participle:monkeywrenching
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monkeywrench Lexical Profile

monkeywrench Game Scores & Validity

• noun

1

North American Something that completely disrupts, sabotages, or halts a plan, process, or operation.

Example

"The sudden departure of the lead architect threw a monkeywrench into the project's timeline."


2

North American A type of adjustable wrench with flat, parallel jaws that can be widened or narrowed by turning a screw mechanism in the handle.

Example

"He grabbed a heavy monkeywrench from his toolbox to tighten the massive bolts on the industrial pipe."

Synonyms
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• verb

1

North American To sabotage, disrupt, or deliberately interfere with a system, plan, or piece of machinery.

Example

"Environmental activists attempted to monkeywrench the illegal logging operation by damaging the construction equipment."

Synonyms
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Antonyms
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Word Nuance & Usage

In British English, the physical tool is typically called an adjustable spanner, and the corresponding idiom for sabotage is 'to throw a spanner in the works'.

Word Origin & Etymology

Originated in the mid-19th century in the United States. The term likely combines 'monkey' (used to denote a specialized or gripping tool) and 'wrench'. The verb sense stems from the early 20th-century idiom 'to throw a monkey wrench in the works', meaning to sabotage.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Monkeywrench. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/monkeywrench
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