-asso.
This is a pejorative suffix.
vido, life.
vidasso, wretched life.
-astre.
In French this suffix has the form -âtre.
óulivastre (Fr. olivâtre), olive in color.
-at.
Coustat is in French côté (side).
The suffix is often diminutive.
auc, a gander.
aucat, gosling.
passero, sparrow.
passerat, small sparrow.