Someone (mag-, mang-) throws sand, etc., at someone's eyes (-an).
mermér
Mangmermer si ādi so anay.
Younger sibling throws sand (at someone's eye).
Mangmermer si ādi so sīt na.
Younger sibling throws (particles) at his friend.
Someone's eye (ma--an) is irritated by sand, etc.
Mamermeran mata kos ahbek.
My eye is irritated by dust.