a. The ablative in -í is found exclusively -
1. In nouns having the accusative in -im (§ 75); also secúris.
2. In the following adjectives used as nouns: aequális, annális, aquális, cónsuláris, gentílis, moláris, prímipíláris, tribúlis.
3. In neuters in -e, -al, -ar: except baccar, iubar, réte, and sometimes mare.
b. The ablative in -í is found sometimes -
1. In avis, clávis, febris,
fínis, ígnis,[1][Always in the formula aquá et
ígní interdící (§ 401).] imber,
lúx, návis, ovis, pelvis, puppis, sémentis,
strigilis, turris, and occasionally in other words.
2. In the following adjectives used as nouns: affinis, bipennis,
canális, familáris, nátális,
rívális, sapiéns, tridéns, trirémis,
vócális.
NOTE 1: The ablative of NOTE 2: Most names of towns in -e (as, Praeneste, Tergeste)
and Sóracte, a mountain, have the ablative in -e. Caere has
Caeréte.
NOTE 3: Canis and iuvenis have cane, iuvene.