Except, unless.
from an dyi + a; marks contrast of alternatives; a proposition with the negative aba is what is/was expected
May kami an delak, an dya machimoy.
We will go tomorrow, unless it rains.
Abaw tod a mangay an dya sira lang ipalōbosaw ni āmang.
No one can just go (as expected), except those father permits.
Machidiman kaba, an dya machisīt ka.
Do not fight (with someone), except (actually) make friends.