Sentence Examples with the word toughened

Hell toughened him up, yet this was one challenge he couldn.t figure out.

From the nitrate are made (a) argenti nitras indurata, toughened caustic, containing 19 parts of silver nitrate and one of potassium nitrate fused together into cylindrical rods; (b) Argenti nitras mitigatus, mitigated caustic, in which 1 part of silver nitrate and 2 parts of potassium nitrate are fused together into rods or cones.

Being very brittle, the spar is rather difficult to work on the lathe, and is often toughened by means of resin.