What does sufficient mean?
Sufficient is an adjective meaning enough to satisfy a requirement or reach a desired standard. It is commonly used with nouns such as “evidence,” “reason,” “funds,” “time,” and “space,” particularly in formal and professional writing. The word can also convey that something is adequate in quality or condition, although that meaning is less common than its sense of providing enough. “Sufficiently” is the corresponding adverb and is used to express the degree to which an action or quality is performed. In legal and technical contexts, sufficient often carries a precise implication: the relevant requirement has been met, without implying that the available amount or quality is especially generous. By contrast, “enough” is generally more conversational, while “ample” often suggests abundance rather than merely meeting a need. Sufficient is also the source of the noun “sufficiency” and is closely related to the verb “suffice.”
adjectiveEnough or more than enough to meet a requirement or achieve a purpose. The word can also mean adequate in quality or condition.
- Enough to meet a need, requirement, or standard.
- Adequate in quality, condition, or capacity.
"The researchers had sufficient evidence to support their conclusion."
"The hotel was comfortable and had sufficient space for the whole family."
"No one could enter without sufficient identification and written authorization."
From Latin, sufficient literally meant “to suffice”: enough was not a matter of luck, but a precise relationship between need and supply.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does sufficient come from?
The word comes from Latin suffīciēns, the present participle of suffīcere, meaning “to be enough” or “to suffice.” It entered English during the late Middle English period and was originally associated with sufficiency or adequacy. The related verb “suffice” and the noun “sufficiency” preserve the same Latin root, as do cognates in several other European languages.
Related word forms
How sufficient is actually used
Widely used in formal and professional contexts, especially in law, academic writing, administration, and technical communication. It often appears in fixed expressions such as “sufficient evidence” and “sufficient reason.”
Easily confused with sufficient
“Sufficient” describes whether something is enough, while “sufficiently” modifies a verb or adverb to indicate the degree to which something is done.