足够 (zú gòu) is an adjective meaning 'sufficient' or 'adequate' — describing a quantity or degree that fully meets a need or requirement. The character 足 means 'foot', but as a standalone word it also means 'enough' or 'complete'; 够 means 'to be sufficient' or 'to reach the required standard'. Together, they form a compound that emphasizes adequacy without excess — often implying just the right amount, not more and not less.

This word commonly modifies nouns (e.g., 足够的时间), follows verbs like 有 or 是 (e.g., 有足够的水), or stands predicate-style after a subject (e.g., 这些钱足够了). It’s neutral in register — appropriate in spoken and written Chinese, from casual conversation to formal reports. Unlike some adjectives, 足够 cannot be reduplicated or modified by very (很) — you wouldn’t say *很足够; instead, use 十分足够 or 非常足够 for emphasis, though simply 足够 is most natural.