noun
haversack
HAV-er-sak/ˈhævərsæk/
A small bag carried over the shoulder for supplies.
The small haversack rests beside hiking boots, its shoulder strap clearly visible.

Etymology
An “oat sack” was a cavalry trooper's bag for horse feed. The name broadened to the portable bag carried by a soldier or hiker.
In context
All four were munching bread and apples, for Aylward had brought in a full haversack and divided them freely amongst his starving comrades.
More examples
- Each soldier keeps basic supplies in a haversack.
- He slings his haversack over one shoulder before leaving.
- Their haversacks hold enough food for the day's walk.
Forms
haversack · haversacks
Similar words
- satchel
- Usually carries books or papers rather than outdoor supplies.
- knapsack
- Usually worn on the back rather than over one shoulder.