haversack
noun
[ ˈhavəsak ]
• a small, strong bag carried on the back or over the shoulder, used especially by soldiers and walkers.
Origin:
mid 18th century: from French havresac, from obsolete German Habersack, denoting a bag used by soldiers to carry oats as horse feed, from dialect Haber ‘oats’ + Sack ‘sack, bag’.