微微 (wēi wēi) is the reduplicated form of 微 (wēi 'slightly'), used as an adverb or adjective to describe a very slight, gentle, or faint degree — e.g., 微微一笑 'give a faint smile'. Compared to the single-character 微, 微微 is more vivid and common in descriptive writing. It differs from 轻微 (qīng wēi 'slight, minor') and 微弱 (wēi ruò 'weak, faint') in that 微微 often modifies verbs directly and carries a delicate nuance.