mollitudo

Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.

Diogenes Laertius, Lives of the Philosophers, Book 2 sec. 32.

Latin > English (Lewis & Short)

mollĭtūdo: ĭnis, f. id.,
I suppleness, flexibility, softness (class.).
I Lit.: mollitudo vocis, flexibility of the voice, Auct. Her. 3, 11, 20: manuum, Pac. ap. Gell. 2, 26, 13: assimilis spongiis mollitudo, Cic. N. D. 2, 55, 136: viarum, Vitr. 10, 6 init.; 10, 2, 11.—
II Trop., softness, susceptibility, weakness: humanitatis, Cic. de Or. 3, 40, 161: corrumpi mollitudine vitiorum, Arn. 2, 64.

mollĭtūdō, ĭnis, f. (mollis),
1 souplesse, flexibilité [de la voix] : Her. 3, 20