Rice-harvest season.
There are two seasons: īwang di tiniyalgaw Main-crop rice harvest season, which ideally occurs during the month Bakākawna, around the latter part of May, and īwang di linawang Second-crop rice harvest season, ideally occurring during the month Letongna, about mid-December. Termination of the harvest season for main-crop rice, luwah di īwang, is by a holiday, tūngaw hi īwang.
For it (actor -um-) to become harvest season, as described above.
Umīwang ya un'a umāli ta waday idat'uh onom.
When (it) becomes harvest season then you come and I will give you food.
A substantive with actor role is unexpressed in the sentence.
dūpag 1
udol 1
ulnub 1