To spy; to (secretly) watch others; to find out information.
Me' a'a maglengngan iyan ngispayi siye iyan.
Those people walking there are spying.
Pī kew ispayanun a'a miya'an bang antag pangingketanne kābewku bakas tinangkewnen.
Go and spy out that person to see where he tied my carabao which he stole.