-en
bisngahen/ bisngaha/ binisngak,
meN-
memisngak/ manbisbisngak/ emisngak,
me-
mebisngak/ ebisngak
To split lengthwise.
Binisngak toy bayengbeng na etak say a-ma to na takgwad.
He split the bamboo lengthwise with a bolo so that he could make it into a water pipe.