EXAMPLES FROM THE WEB FOR HARDENING
They were street boys; their lives had been spent in a hardening atmosphere.
He was hardening his throat, and so slept with a wet towel about it.
Blessed ignorance of the hardening influences of the coming years!
Cf. Joseph and his brethren for this hardening of his heart.
The whole year round the thorn has been hardening and sharpening.
Fao's hackles were very evidently on the rise; Delcamp's face was hardening.
"If she moves she is betrayed," he thought with hardening heart.
Sometimes I seem to myself to be hardening into stone, body and soul.
His gristle is hardening into something like his stern old father's backbone.
The hardening process had been, if anything, all too complete.