Someone (ma-, maycha-) shivers, trembles from anger, cold, or fear.
tigergér
Mamirpir ako naya, ta mahanebneb.
I shiver, because it is cold.
Naychamirpirpir iyaw tawo do kāmo na.
The person trembled from his fear.
Someone makes someone or something (pa--en) shiver, tremble.
Pamirpiren mwabaw tanoro mo.
Don't make your hand tremble.