For someone (actor & theme ma-, i-) to begin to do something, as to get up, go someplace, begin a journey, dance.
As a command, it is similar to English, Come on!
Mala''uy'a ta umuyta.
Begin! Let's go.
Ila''uy: unexpressed theme focus is on oneself.
Ila''uymin manāyaw.
We will begin to dance.
Ila''uy tu'uh mā'et ta umuy tu'ud Manila.
We will begin (our journey) tomorrow so that we will go to Manila.