| traitorous | |
| trumped-up | |
| unauthentic | |
| uncommon(adjective, wrong, improper, incorrect) | |
| unconventional(adjective, wrong, improper, incorrect) | |
| unctuous | |
| underhanded | |
| uneven | |
| unnatural | |
| unpredictable | |
| unsafe(strong, secure) | |
| unstable(adjective, uncertain, dishonest, apathetic, unfaithful) | |
| unsteady(adjective, uncertain, dishonest, apathetic, unfaithful) | |
| unsuitable(adjective, wrong, improper, incorrect) | |
| unusual(adjective, wrong, improper, incorrect) | |
| variable | |
| visionary | |
| wavering(adjective, uncertain, dishonest, apathetic, unfaithful) | |
| weak(adjective, uncertain, dishonest, apathetic, unfaithful) | |
| weak point |
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| APA | Smart Define. (2016). true thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/true/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "true thesaurus" https://smartdefine.org/true/thesaurus/antonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, true thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/true/thesaurus/antonyms>. |
| MLA | Smart Define. "true thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/true/thesaurus/antonyms> |