Definition
to secure or ensure something is securely fastened
緊固；繫上
Before going out in the fall, remember to do your coat up.
秋天出門前，記得把你的外套繫好。
She always does her seatbelt up to ensure her safety while driving.
她總是繫好安全帶，以確保開車時的安全。
You need to do the zipper up on this dress before you can wear it.
你需要把這件衣服的拉鍊拉上才能穿。