in-dēclīnātus, a, um, adj.,
unchanged , constant (Ovidian). Of persons: qui perstas indeclinatus amico, Ov. P. 4, 10, 83.— Of things: amicitia, Ov. Tr. 4, 5, 24.
in-dēclīnātus adj., unchanged, constant: amico, O.: amicitia, O. ...
An Elementary Latin Dictionary