# unwise

/ənˈwaɪz/ (US) · /ʌnwˈaɪz/ (UK) · CEFR B2 · Adjective

Source: https://englishreference.com/word/unwise
Updated: 2026-05-08

## Definition

not sensible or smart. You use this to describe a choice or action that will likely cause problems later.

For teachers: lacking in sensible judgment or prudence; likely to result in misfortune or failure. Often used to describe decisions, investments, or behaviors rather than people directly.

## Examples

- It is unwise to leave your car unlocked in the city.
- The board decided it would be unwise to expand the business during such an unstable economic period.
- While the initial offer seemed lucrative, the legal team warned that signing the contract without a termination clause would be an extremely unwise move for the long-term health of the firm.

## Usage notes

- Often follows a linking verb like 'be', 'seem', or 'appear'. Frequently used with an infinitive phrase ('unwise to do something').

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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.