Skin (mag-) becomes wrinkled.
kuretrét
Magkoribetbet danaw kodit na, ta baket dana.
Her skin already becomes wrinkled, because she is already old.
Old age, etc., causes skin (pa--en, pag--en) to be wrinkled.
Pagkoribetbeten kabaket ni āpong ropa na.
Grandmother's old age causes her face to be wrinkled.