connect, match

搭 is composed of the radical 手 (hand) and 荅 (pod, respond). 荅 is formed from the radical 艸 (grass) and 合 (fit, together), originally referring to leguminous plants with pods, but here it draws on the meaning of 合, which implies connection or correspondence. 手 signifies action, so 搭 means to connect or join, often implying fitting together or linking.