By rebracketing of words such as amābilis (which comes from amāre, amō), where -ā- is part of the stem of a first conjugation verb. The word habilis (“proper, apt”) is sometimes incorrectly stated as being the origin of the suffix, but instead came from earlier *habibilis, from habeō + -ibilis, and was reduced by haplology.
-ābilis (neuter -ābile); third-declension two-termination suffix
Third-declension two-termination adjective.
| Number | Singular | Plural | |||
|---|---|---|---|---|---|
| Case / Gender | Masc./Fem. | Neuter | Masc./Fem. | Neuter | |
| Nominative | -ābilis | -ābile | -ābilēs | -ābilia | |
| Genitive | -ābilis | -ābilium | |||
| Dative | -ābilī | -ābilibus | |||
| Accusative | -ābilem | -ābile | -ābilēs -ābilīs |
-ābilia | |
| Ablative | -ābilī | -ābilibus | |||
| Vocative | -ābilis | -ābile | -ābilēs | -ābilia | |