The phrase "throws a monkey wrench into" is an idiomatic expression that originated in North America, particularly in the United States, and is commonly used in both colloquial and formal English. This phrase is used metaphorically to describe the act of disrupting or obstructing a process or situation, typically by introducing unexpected complications or difficulties.
"Throws a monkey wrench into" is derived from the image of someone disrupting the smooth operation of a machine by literally throwing a wrench or spanner into its gears, causing the operation to come to a grinding halt. The wrench represents an unforeseen problem or obstacle that renders the smooth functioning of the machine impossible.
In a broader sense, this phrase is often used to describe any action, decision, or circumstance that hampers progress or creates obstacles in a given situation. It implies the introduction of unexpected complications that create difficulties, delays, or conflicts.
For example, if someone says, "His untimely resignation on the eve of the project launch throws a monkey wrench into our plans," it means that the sudden departure of a key team member has significantly disrupted or derailed the implementation of the project.
In summary, "throws a monkey wrench into" conveys the idea of introducing an unforeseen obstacle that disrupts or impedes the smooth progress of any process, plan, or situation.
