The surface of tree trunks, walls, floors, etc., (ma-) is slippery, but not from moisture.
Ivv. 'smooth as clothing'
Mahabnyiw kayo nyoy.
The coconut palm (trunk) is slippery.
galís
The surface of something (-om-, maypa-) becomes slippery.
past -homnabnyi
Naypahabnyiw ratag, ta nalampāso so maganay.
The floor became slippery, because (it) was polished well.