in-frăgĭlis

e, adj.
I. that cannot be broken to pieces.
I. Lit.: adamas, Plin. H. N. 20 prooem. § 2.—
II. Trop., strong, that cannot be weakened: vox, Ov. Tr. 1, 5, 53: animi, Sen. Vit. B. 9.
Lewis & Short
A Latin Dictionary, 1879
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