Synonyms|402Antonyms|192|Broader|3Narrower|12Related|1.1k
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unpleasant
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unprotected
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unshielded
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unsympathetic
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untoward
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untrained
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untrustworthy(open, honest)
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venturesome
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vulnerable
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wasteful
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wide open(expression, healthy)
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wily
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APASmart Define. (2016). harmless thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/harmless/thesaurus/antonyms
ChicagoSmart Define. 2016. "harmless thesaurus" https://smartdefine.org/harmless/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, harmless thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/harmless/thesaurus/antonyms>.
MLASmart Define. "harmless thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/harmless/thesaurus/antonyms>