HARDEN

harden. Harden, v. to make or grow hard, to confirm

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Hard″en (härd″'n), v. t. [imp. & p. p. Hardened (–'nd); p. pr. & vb. n. Hardening (–'n‐ĭng).] [[OE. hardnen, hardenen.]] 1. 1. To make hard or harder; to make firm or compact; to indurate; as, to harden clay or iron.
2. 2. To accustom by labor or suffering to endure with constancy; to strengthen; to stiffen; to inure; also, to confirm in wickedness or shame; to make unimpressionable. “Harden not your heart.” Ps. xcv. 8.
I would harden myself in sorrow. Job vi. 10.