§76. Summary of i-Stems

The regular form of the Ablative singular of i-stems would be -ī: as, sitis, sitī; but in most nouns this is changed to -e.

a. The ablative in -ī is found exclusively—

• In nouns having the accusative in -im (§ 75); also secūris.
• In the following adjectives used as nouns: aequālis, annālis, aquālis, cōnsulāris, gentīlis, molāris, prīmipīlāris, tribūlis.

• In neuters in -e, -al, -ar: except baccar, iubar, rēte, and sometimes mare. b.

  The ablative in -ī is found sometimes—

  • In avis, clāvis, febris, fīnis, īgnis,¹ imber, lūx, nāvis, ovis, pelvis, puppis, sēmentis, strigilis, turris, and occasionally in other words.
  • In the following adjectives used as nouns: affīnis, bipennis, canālis, familiāris, nātālis, rīvālis, sapiēns, tridēns, trirēmis, vōcālis.