Someone (ma-, ma--an) is amazed, astonished at/by something (cha-).
siddáaw
Masdāaw ako do naparin dyaken.
I am amazed at what happened to me.
Masdāawan ako, ta nagkimat.
I am surprised, because there was lightning.
Chasdaaw ko kāron benyebeh.
I am amazed at the abundance of bananas.
kasdāaw
The amazement, astonishment, or wonder of something.
Something (ma-) is amazing, astonishing, wonderful.
must be reduplicated
Naboya daw makaskasdāaw saw a pinarin na.
They saw the amazing (things) he did.