Use hardening in a sentence

This page helps answer: how do I use the word hardening in a sentence? How do you use hardening in a sentence? Can you give me a sentence for the word hardening? It may also be related to montessori, highschool, help, kindergarten school, student, high school education high school, read, and homeschooling.

Example sentences with the word hardening, a sentence example for hardening, and hardening in sample sentence.