inflexibilis
From LSJ
Χρυσὸς δ' ἀνοίγει πάντα κἂν ᾍδου (κἀίδου) (καὶ χαλκᾶς) πύλας → Aurum omnia aperit, inferûm portas quoque → Gold öffnet jedes Tor sogar der Unterwelt | Gold öffnet alles, jedes Tor sogar aus Erz
Latin > English (Lewis & Short)
in-flexĭbĭlis: e, adj.,
I that cannot be bent, inflexible.
I Lit.: dolor (cervicum), lockjaw = opisthotonos, Plin. 28, 12, 52, § 192; cf. Cael. Aur. Acut. 3, 6, 65.—
II Transf.: judicium, unchangeable, Sen. Ep. 95: obstinatio, Plin. Ep. 10, 97, 3.