When to use to tighten in Korean
Korean: 조이다[ jo-i-da ]

When to use it
To tighten means to make something less loose and more secure. In Korean, 조이다 is used when you turn, pull, or fasten something like a cap, lace, belt, or screw. You can use it for many everyday actions at home, at school, or while traveling.
Example sentences
병뚜껑을 꽉 조여요.
I tighten the bottle cap tightly.
학교에 가기 전에 신발 끈을 조여요.
I tighten my shoelaces before going to school.
자전거 브레이크를 좀 조여 주세요.
Please tighten the bicycle brake a little.
가방 끈이 느슨해서 조였어요.
The bag strap was loose, so I tightened it.
이 나사가 풀렸어요. 드라이버로 조이세요.
This screw is loose. Tighten it with a screwdriver.
비행기에서 안전벨트를 더 조였어요.
I tightened my seat belt more on the airplane.