From in- (“not”) and -is, with change to third declension i-stem.
When affixed to a third-declension noun that has a contracted nominative singular form in -s from -t-s or -d-s, the adjective also has a contracted nominative singular form. Example: ars > *in-art-is > iners; frōns > *in-frond-is > īnfrōns.
Indeclinable portion with a third-declension two-termination adjective.
singular | plural | ||||
---|---|---|---|---|---|
masc./fem. | neuter | masc./fem. | neuter | ||
nominative | in- -is | in- -e | in- -ēs | in- -ia | |
genitive | in- -is | in- -ium | |||
dative | in- -ī | in- -ibus | |||
accusative | in- -em | in- -e | in- -ēs in- -īs |
in- -ia | |
ablative | in- -ī | in- -ibus | |||
vocative | in- -is | in- -e | in- -ēs | in- -ia |