guà​gōu​r

to link up

挂钩儿 掛鉤兒 guà//gōu​r
to link up
To link up or establish contact with; to peg one thing to another, such as tying pay to performance.
to couple
To couple together, such as two railway coaches or mechanical parts.
hook
A physical hook for hanging items; a latch hook or a coupling link.
to collude
(Taiwan) to collude or work together in a secret or illicit way