jiē​tóu​r

joint

接头儿 接頭兒 jiē​tóu​r
joint
a connection or joint in machinery or engineering
to connect
to join two parts together; to make a connection
to contact
to get in touch with someone or meet up, often in secret or according to a plan
to know about
to have knowledge of something; to be aware of a situation
seam
a point where two things such as pieces of fabric are joined together