| Nominativ | obstinatum, obstinatus, obstinata | obstinata, obstinatae, obstinati |
| Genitiv | obstinatae, obstinati, obstinati | obstinatarum, obstinatorum, obstinatorum |
| Dativ | obstinatae, obstinato, obstinato | obstinatis, obstinatissima, obstinatissime, obstinatissimum |
| Akkusativ | obstinatum, obstinatum, obstinatam | obstinatosque, obstinata, obstinatas, obstinatos |
| Ablativ | obstinata, obstinato, obstinato | obstinatis, obstinatissima, obstinatissime, obstinatissimum |
| Vokativ | obstinata, obstinatum, obstinate | obstinati, obstinata, obstinatae |
