cast off
phrasal verb with cast verb uk/kɑːst/ us/kæst/ cast | cast
(LEAVE)
(船)解缆启航
If a boat casts off, it leaves the shore.
The ship was scheduled to cast off at 8 p.m. 这艘船定于晚上8点启航。
(FINISH)
fabrics specialized(编织时)收针
in knitting, to use special stitches to finish the thing you are making