頷首之交

nodding acquaintance

chin / to nod (one's assent)

to nod one's head

head / chief / first (occasion, thing etc) / classifier for poems, songs etc

(possessive particle, literary equivalent of 的[de5]) / him / her / it

to hand over / to deliver / to pay (money) / to turn over / to make friends / to intersect (lines) / variant of 跤[jiao1]