hardtack
/ˈhɑrdtæk/
noun
- A hard, dry biscuit or cracker made from flour and water, often used as a long-lasting food on ships or in the military.
- Sailors on long voyages used to survive on hardtack and salted meat.
- The soldiers soaked their hardtack in coffee to make it soft enough to chew.
- Hardtack can last for years if stored in a dry place.