For someone (agent; s agent maN-) to deepen the outlet of a shallow body of water (theme i-), especially an interplot spillway of a pond field or irrigation canal turnout, gūheng, to allow the water to flow more freely.
Nun'iyalut'ut Lu'mag nan gūheng di payaw Aligūyun at natdu'.
Lu'mag deepened several interplot spillways of Aligūyun's pond fields and so they were drained.
For someone (agent; s agent maN-) to remove mud and stones (theme) from a spillway gate, hagnong, (loc ref -an), to allow the water to flow more freely.