supel verb English. Mumbles; speaks as if one's mouth were full of food. noun English. Speech impediment which sounds as if one's mouth were full of food. Example sentence: Subanen. Duuni getaw sa' mektalu' kig dila'en supel. English. There is a person when she talks, her tongue has an impediment. Example sentence: Subanen. Ki gembata' kiin, ndi' na mesuangi talu'en, sagya laak peksupel pu' mipenu' gemay ig baba'en. English. As for that child, she can't get her words out, she randomly just mumbles, because her mouth is full.