tie up

Từ điển Oxford Advanced Learner 8th

ˌtie ˈup | ˌtie sthˈup derived
1. to attach a boat to a fixed object with a rope
• We tied up alongside the quay.
• We tied the boat up.
2. to close sth with a knot; to be closed or fastened with a knot
•to tie up a garbage bag
Main entry: ↑tie_derived