noun (plural ~ or ~s) Date: 1836 a saltless hard biscuit, bread, or cracker, any of several mountain mahoganies (especially Cercocarpus betuloides )
HARDTACK
Meaning of HARDTACK in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012