prae-dūro, āvi, ātum, 1, v. a.
I Lit., to make very hard , harden very much (postAug.): sucus praeduratus, Plin. 23, 7, 71, § 139; Apic. 6, 9; 7, 4; 8.—
II Trop., to harden , indurate , Prud. στεφ. 5, 177.