rucksack
ruck‧sack /ˈrʌksæk/
noun [countable]
SYN backpack
ruck‧sack /ˈrʌksæk/
noun [countable] Date: 1800-1900
Language: German
Origin: 'back sack'
especially British English a bag used for carrying things on your back, especially by people on long walks Language: German
Origin: 'back sack'
SYN backpack