Someone (ma--an) is anxious, worried about something.
Madanāgan ako an myan bagyo.
I am worried when there is a storm.
Someone or something (mang-) makes someone (-en) anxious, worried in order to keep him from doing something.
must be reduplicated
Dandanāgen ni ākang si āmang tan dya mangay a maganinaw.
Older sibling makes father worried so that he does not go fishing.