13
vulnerable(adjective, strong, open)
9
naive
4
careless(adjective, attentive, artless, responsible)
4
feeble
3
reckless
2
bohemian
2
endangered
2
exposed(hidden, clothed)
2
heedless
2
incautious
2
neglectful
2
negligent
2
open
2
remiss
2
unguarded
2
unwary
1
blighted
1
brash
1
defenseless
1
frank
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APASmart Define. (2015). guarded thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/guarded/thesaurus/antonyms
ChicagoSmart Define. 2015. "guarded thesaurus" https://smartdefine.org/guarded/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, guarded thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/guarded/thesaurus/antonyms>.
MLASmart Define. "guarded thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/guarded/thesaurus/antonyms>