关

guan

shut, close

if 'open' is two hands pushing up a latch, 'guan' is a warrior closing a gate and tying it with a rope

辶

chuo

送

song

to send/see off

close (guan) + go [chuo]

a warrior goes wherever he is sent off to fight

耳

er

联

lian

join, unite

to connect, to ally

ear/connection (er) + close (guan)

the ears the soldier brought back are tied to be connected together