hardtack

== English == === Alternative forms === hard tack === Etymology === From hard +‎ tack. This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. === Noun === hardtack (countable and uncountable, plural hardtacks) (nautical) A large, hard biscuit made from unleavened flour and water; formerly used as a long-term staple food aboard ships. Synonyms: pilot biscuit, pilot bread, sea biscuit, sea bread, ship's biscuit, ship biscuit, ship bread; (military slang) Anzac wafer, sheet iron, tooth duller, worm castle Hypernyms: tack; biscuit; bread Meronym: reefer's nut Coordinate term: soft tack ==== Translations ====