# throw a wrench in

idiom

Source: https://englishreference.com/idiom/throw-a-wrench-in
Updated: 2026-08-10

## Meaning

To introduce a problem, dilemma or obstacle in; to complicate.

## Examples

- The sudden rain threw a wrench in our picnic plans.
- The unexpected arrival of extra guests threw a wrench in our dinner preparations, so we had to order pizza instead.
- His sudden resignation just days before the project deadline threw a wrench in the entire operation, forcing the team to work through the weekend to recover.

## Origin

See throw a wrench in the works.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.