Meaning

noun an enlarged and muscular saclike organ of the alimentary canal; the principal organ of digestion

noun the region of the body of a vertebrate between the thorax and the pelvis

noun an inclination or liking for things involving conflict or difficulty or unpleasantness

originFrom Middle English stomak, from Old French estomac, from Latin stomachus, from Ancient Greek στόμαχος (stómakhos), from στόμα (stóma, “mouth”). Partially displaced native Old English maga, whence Modern English maw.

Etymology from Wiktionary, CC BY-SA 3.0