Unstrengthening is a word used to describe something that weakens or undermines. However, when we talk about antonyms for the word "unstrengthening," we are referring to words that refer to the opposite meaning of the word. Antonyms for the word "unstrengthening" include "strengthening," "fortifying," "bolstering," "improving," "enhancing," and "stabilizing." These words all refer to the process of making something stronger, more stable, and resilient. By using these words instead of "unstrengthening," we can convey a positive message and emphasize the importance of building strength, resilience, and stability in our lives.