Unfeeling or lacking emotion due to experience; callous.
Made or become hard or harder (in various senses)
Hardened Sentence Examples
If the bar inserted into the coil is of hardened steel instead of iron, the magnetism will be less intense, but a larger proportion of it will be retained after the current has been cut off.
They must be well hardened off before being set out in the open.
Oil hardened and annealed, magnified 50 diameters.
When the load on a hardened wire is gradually increased, the maximum value of I is found to correspond with a greater stress than when the load is gradually diminished, this being an effect of hysteresis.