Radical 亠
6 strokes
lid 亠 (25b) + father 父 (367) = pay 交
The basic meaning is to “hand over” or “transfer”; hence “exchange” and (social) “intercourse”.
[外交 (71) wàijiāo foreign affairs]

The boy bangs a saucepan lid by his father’s ear. “Pay me my pocket money!” / But the father only grunts — he’s watching the two giants jousting on TV.