Use harden in a sentence

This page helps answer: how do I use the word harden in a sentence? How do you use harden in a sentence? Can you give me a sentence for the word harden? It may also be related to educations, children education, montessori school, homeschool, activities, study, exercise, and diploma.

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