English Reference
adjective · noun

inadequate

adj. · n.
US /ˌɪˈnædəˌkweɪt/ UK /ɪnˈædɪkwət/ in·ad·e·quate

  1. 01 B2 Upper Intermediate

    adj.not enough of something to meet a need.

    adj.insufficient in quantity or quality to satisfy a particular requirement or purpose.

    Simple

    The food supplies were inadequate for the large number of people at the camp.

    In context

    The existing infrastructure proved woefully inadequate for the sudden influx of seasonal workers, leading to significant delays in local transport.

    Usage

    Often used with the preposition 'for' to indicate the purpose being failed.

  2. 02 B2 Upper Intermediate

    adj.lacking the quality or ability that is needed for a task.

    adj.failing to reach an expected or required standard of quality or competence.

    Simple

    He felt inadequate in his new job because he didn't understand the software.

    In context

    Despite her extensive experience, she felt strangely inadequate when asked to lead the international delegation through the complex legal negotiations.

  3. 03 C2 Proficiency Formal

    n.a person who is not able to deal with the demands of life or a specific situation.

    n.a person who lacks the necessary emotional or mental stability to cope with everyday life or social requirements.

    Simple

    The novel describes a man who sees himself as a social inadequate.

    In context

    The report suggested that the facility was housing several social inadequates who required more intensive psychological support than the staff could provide.

    Usage

    Usually functions as a countable noun, often in psychological or sociological contexts.

Usage inadequate response · inadequate training

The study cited "unique stressors, such as poor habitability, noise and demanding schedules that leave inadequate time for sleep and rest".

BBC News· 13 Aug 2026

The American Civil Liberties Union (ACLU) welcomed Flock’s decision to slash the recommended data retention period, but said other changes were superficial or recycled versions of inadequate safety features.

Al Jazeera· 14 Aug 2026

From in- + adequate.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated