haversack
US /ˈhæv.ɚ.sæk/
UK /ˈhæv.ɚ.sæk/
1.
a bag carried on one's back or over the shoulder, used especially by soldiers or hikers
:
•
He packed his lunch and water bottle into his haversack before heading out for the hike.
•
The soldier carried his essential gear in a sturdy canvas haversack.