Someone (mang-) looks carefully at someone (-en) or someone examines something in order to identify it.
mingmíng
tingnan ng mabuti
imangmang
Mangimangmang si ādi so tawo.
Younger sibling looks carefully at people.
Imangmangen mo an sino nawri a tawo.
Look carefully to see who that person is.
Inimangmang ko taga ni ākang.
I examined the cut of older sibling.
Someone (ma-) can identify, recognize someone or something from looking carefully.
kilala
imangmang, sinchad
Aran chichiban da, ki maimangmang daba.
Even though they look (carefully), they can not identify it.
Polos a dyi da naimangmang si Jose.
They absolutely can not recognize Jose.