IPA: /ˈpæksæk/
KK: /ˈpæksæk/
A type of bag made of canvas or leather that is worn on the back and held up by shoulder straps, used for carrying items while traveling or hiking.
He packed his clothes and supplies into his packsack for the hiking trip.
Packsack is formed from "pack" (from Old English *pæcca*, meaning to bundle or carry) and "sack" (from Old English *sæc*, meaning a bag or pouch). The word "packsack" refers to a bag designed for carrying items, typically on one's back.
Think of a 'bundle' ('pack') placed in a 'bag' ('sack') — that's how you remember that a packsack is a bag for carrying things.
No commonly confused words.