| masculin | feminin | neuter | plural | |
|---|---|---|---|---|
| Nominative | дряхлый | дряхлая | дряхлое | дряхлые |
| Genitive | дряхлого | дряхлой | дряхлого | дряхлых |
| Dative | дряхлому | дряхлой | дряхлому | дряхлым |
| Accusative inanimate | дряхлый | дряхлую | дряхлое | дряхлые |
| Accusative animate | дряхлого | дряхлую | дряхлое | дряхлых |
| Instrumental | дряхлым | дряхлой / дряхлою | дряхлым | дряхлыми |
| Prepositional | дряхлом | дряхлой | дряхлом | дряхлых |
| Short form | дряхл | дряхла | дряхло | дряхлы |