triptote
A noun which has three cases.
In Modern Standard Arabic, nouns belong to triptotes or diptotes, or can be indeclinable.
Where it comes from
From Latin triptōtum, from Ancient Greek τρίπτωτος (tríptōtos), from τρι- (tri-, “three”) + πίπτω (píptō, “to fall”) + -τος (-tos, verbal adjective–forming suffix), influenced by the verbal noun πτῶσις (ptôsis, “inflection”).
Adapted from the Wiktionary entry triptote (CC BY-SA 4.0).