We found one dictionary that defines the word unstrengthen:

General (1 matching dictionary)

1. unstrengthen: Merriam-Webster

Opposite: strengthen, fortify, reinforce, bolster, enhance ▸ Words similar to unstrengthen ▸ Usage examples for unstrengthen ▸ Idioms related to unstrengthen ▸ Wikipedia articles (New!) ▸ Words that often appear near unstrengthen ▸ Rhymes of unstrengthen ▸ Invented words related to unstrengthen