For someone (agent muɴ-) to peel the boiled skin (theme) from a sweet potato tuber (loc ref -an).
pangmud
Umūdam han lapnay ya unmu onon.
Peel off the boiled skin of the sweet potato before you eat it.
For someone (agent) to use a suitable instrument, as a knife (inst paN-) for peeling off boiled skin, as described above.