Someone or something (-om-, mang-) hits or strikes against something (-en).
dalápus
Namdis salawsaw naw a domnalapos do tokonaw.
The wind changed whereby (it) struck against the mountain.
Sino makey a mangdalapos so nawri a mahnyi?
Who is able to strike against that which is sturdy?
Dalaposen mwabaw nawri tan dya malba.
Don't hit against that so it does not topple over.
Someone causes something to hit or strike against someone or something (ipa-).
Ipadalapos naw do nwang ahad naw.
He causes the carabao to strike against his fence.