Rule reminder
-abile (from -are verbs) and -ibile (from -ere/-ire verbs) = '-able'/'-ible' in English. They mean 'capable of being done'. E.g. mangiare → mangiabile (edible); credere → credibile (credible); capire → capibile (understandable).
What is the adjective from 'mangiare' (to eat) meaning 'edible'?