From Old English gréot ('sand, dust, earth'), from Proto-Germanic greutą, related to Old Norse grjót ('stones') and German Grieß ('semolina, coarse grain'). The figurative sense of 'courage and fortitude' developed in 19th-century American English — famously popularised by Charles Portis's 1968 novel True Grit. The food 'grits' shares the same root via coarsely ground grain.