For a knot, a cord binding something (patient ma-) to be loose.
Inhamad'un inhi'gut nan pāut di kalga at adi ma'ūbad.
I securely tied the tying material of the cargo so it will not be loose.
For someone (agent muɴ-; s agent maN-) to loosen a knot, a cord (patient -on) binding something, by untying it, cutting or breaking the cord.