Where does “stomachus” come from?

stomachus (Spanish) comes from Ancient Greek στόμαχος, from Ancient Greek στόμα, from Proto-Indo-European stomn̥.

Ancestry of “stomachus”, step by step

StepLanguageWordMeaning
1Ancient Greekστόμαχοςthroat, gullet; stomach; bladder
2Ancient Greekστόμαmouth; face; The source of a river or stream
3Proto-Indo-Europeanstomn̥—
Every word from Proto-Indo-European stomn̥ →Every word from Ancient Greek στόμα →Every word from Ancient Greek στόμαχος →