54 entries under expression topic. ×

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not versed in(idiom, unacquainted)
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off guard(suddenly, unexpectedly, unawares)
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off one's guard(idiom, inexpectation)
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off top of head(idiom, vulnerable)
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on spur of moment(idiom, adverb, unexpectedly, abruptly)
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on the hop(idiom, suddenly, unexpectedly, unawares)
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out of contact(idiom, unacquainted)
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played by ear(idiom, unqualified, vulnerable, unsuspecting)
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stupid automatic(silly, foolish, senseless, unnecessary)
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taken off guard(idiom, unqualified, vulnerable, unsuspecting)
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unfamiliar with(ignorant, uninformed)
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without delay(adverb, suddenly, unexpectedly, unawares)
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without hesitation(adverb, suddenly, unexpectedly, unawares)
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without knowledge
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APASmart Define. (2016). unaware thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unaware/thesaurus/synonyms
ChicagoSmart Define. 2016. "unaware thesaurus" https://smartdefine.org/unaware/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, unaware thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unaware/thesaurus/synonyms>.
MLASmart Define. "unaware thesaurus" 30 January 2016. Web. 22 September 2026. <https://smartdefine.org/unaware/thesaurus/synonyms>