For wood, grass (patient ma-) to be rotten, as the posts or grass roof of a house, etc.
manūnut
For dirt, water (actor -um- & inst; s actor maN- & inst) to rot something (patient -on) such as wood, a grass roof, etc.
w̱nom nan muntūdun kamaw ti dumūnut hinan dotal.
Remove the leaky pail because it will rot the floor.