ἄκλιτος
From LSJ
πείθεται πᾶς ἥδιον ἢ βιάζεται (Dio Cassius, Historiae Romanae 8.36.3) → it's always more pleasant to be persuaded than to be forced
English (LSJ)
ον, Gramm.,
A indeclinable, D.T.641.23, A.D.Synt.30.10; Ael. Dion. wrote περὶ ἀκλίτων ῥημάτων. Adv. ἀκλίτως, ἔχειν Eust. 162.32. 2 Math., = ἀκλινής, Procl.in Euc.p.290F. 3 stable, Iamb.Myst.1.15.
German (Pape)
[Seite 74] 1) unbeweglich, unerbittlich, v. l. Theocr. 27, 16, für ἄλλυτον λίνον. – 2) indeclinabel, Gramm.