English Reference
adjective

sufficient

adj.
US /səˈfɪʃənt/ UK /səfˈɪʃənt/ suf·fi·cient

  1. 01 B2 Upper Intermediate Academic

    having as much as you need for a particular purpose.

    adequate to any proposed design or end; satisfying requirements or needs.

    Simple

    The team had sufficient time to finish the project before the deadline.

    In context

    The prosecution failed to provide sufficient evidence to convince the jury beyond a reasonable doubt.

    Usage

    Often followed by the preposition 'for' or a 'to-infinitive' clause.

    Pitfall
    We have sufficient of food for the week. We have sufficient food for the week.

    Do not use 'of' after 'sufficient' when it is followed directly by a noun.

  2. 02 C1 Advanced FormalLiterary

    having the right skills or power to do a job.

    possessing adequate talents, accomplishments, or legal power; competent and fit for a purpose.

    Simple

    He proved himself sufficient for the difficult task of leading the company.

    In context

    The candidate was deemed sufficient in her technical expertise, though her interpersonal skills required further development.

    Teacher's tip

    This sense is less common in modern speech; 'competent' or 'capable' is usually preferred in professional contexts.

Don't confuse

sufficient vs adequate — Sufficient means you have the right amount; adequate means that amount is just good enough to pass.

Don't confuse

sufficient vs efficient — Efficient is about how well a task is performed with minimal waste, while sufficient is simply about having enough of something to meet a need.

Usage concurrent sufficient · sufficient condition · sufficient data

Nearly half of the players (48.4%) in the group said current cooling breaks were sufficient to protect players, while only 15.3% said the current policies were sufficient.

Al Jazeera· 14 Aug 2026

But this is not sufficient to wage a broad operation.

Al Jazeera· 15 Aug 2026

From Old French sufisanz, soficient, from Latin sufficiēns, present participle of sufficiō.

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

This entry
Level B2 · Upper Intermediate
Frequency Common
Updated