掛鉤

hook (on which to hang sth) / to couple / to link together / to establish contact with / hook / coupling links (e.g. between two railway coaches)

to couple; to link; to hook together / (fig.) (preceded by 與|与[yu3] + {entity}) to establish contact (with {entity}); (Tw) to collude (with {entity}) / (fig.) to link (marketing efforts with production etc); to peg (welfare payments to inflation etc); to tie (remuneration to performance etc) / hook (on which to hang sth); latch hook; coupling

to hang or suspend (from a hook etc) / to hang up (the phone) / (of a line) to be dead / to be worried or concerned / to make a phone call (dialect) / to register or record / classifier for sets or clusters of objects / (slang) to kill / to die / to be finished / to fail (an exam)

to hook / to sew / to crochet / hook / check mark or tick / window catch

erhua variant of 掛鉤|挂钩[gua4 gou1]