How to write 点头点头

point; dot; drop; speck; o'clock; point (in space or time); to draw a dot; to check on a list; to choose; to order (food in a restaurant); to touch briefly; to hint; to light; to ignite; to pour a liquid drop by drop; (old) one fifth of a two-hour watch 更; dot stroke in Chinese characters; classifier for items

head; hair style; the top; end; beginning or end; a stub; remnant; chief; boss; side; aspect; first; leading; classifier for pigs or livestock