微笑 (wēi xiào) literally combines 微 (wēi), meaning 'slight' or 'subtle', and 笑 (xiào), meaning 'to laugh' or 'smile'. Together, they describe a gentle, quiet, and often warm facial expression — not a broad or loud laugh, but a soft, restrained smile that conveys friendliness, politeness, shyness, or quiet joy. It’s one of the most common and socially important expressions in Chinese communication, frequently used to show respect, ease tension, or express modesty.

This word functions flexibly as both a noun ('a smile') and a verb ('to smile gently'). As a verb, it’s typically used intransitively and often appears with adverbs like 轻轻地 (qīngqīng de, 'gently') or 自然地 (zìrán de, 'naturally'). Unlike the more intense 大笑 (dà xiào, 'to burst out laughing'), 微笑 carries a sense of calm, dignity, and emotional restraint — making it especially appropriate in formal, professional, or sensitive interpersonal contexts.