어깨끈이 있어 등에 메는 가방으로, 주로 튼튼하고 방수 기능이 있는 재질로 만들어져 등산객들이 널리 사용하는 배낭
a bag with shoulder straps that allow it to be carried on someone's back, typically made of a strong, waterproof material and widely used by hikers
예문:
"He adjusted the straps on his rucksack before starting the steep climb."
"She carried a small rucksack containing her camera and a water bottle."