颔首之交 hànshǒuzhījiāo nodding acquaintance Origin Definitions Defs Strokes Stroke Words Sentences Sents 颔首 頷首 hànshǒu to nod to nod one's head, often as a sign of greeting, acknowledgement, or approval之 zhī particle [possessive] Connects a describing word or phrase to the noun it describes, similar to 的 de but used in formal or literary writing.交 jiāo noun friendship Friendship; social or diplomatic relations