For a fire, glowing coals (patient ma-) to be low.
maba
Naba nan apuy ti napuh di nitungu.
The fire is low because the firewood was consumed.
ma-: maba
For someone (agent muɴ-; s agent maN-) to decrease the intensity of a fire (patient -on) by removing some of the glowing coals, as to reduce the heat under a pot when cooking.
obon; mangba; emba
Emba' nan apuy ti nalūtu nan bogah an nihāang.
I decreased the intensity of the fire because the rice which was being boiled was cooked.
-on: obon; -iɴ-: emba; maN-: mangba