5
blushing(adjective, soft, shy, meek, modesty)
5
cautious(adjective, quiet, gentle, uncertain, aloof)
5
fainthearted(adjective, weak, nervous, shy, worried)
5
quiet(adjective, soft, shy, meek, frugal)
4
afraid(adjective, weak, uncertain, fear, shy)
4
distrustful(adjective, nervous, hesitant, insecure, unsure)
4
dubious(adjective, uncertain, nervous, doubtful, hesitant)
4
faint-hearted(adjective, weak, fear, nervous, shy)
4
jumpy(uncertain, nervous, shy, worried, hesitant)
4
loath(adjective, uncertain, shy, doubtful, hesitant)
4
pusillanimous(adjective, weak, nervous, shy, worried)
4
self-doubting(uncertain, nervous, insecure, unsure, unconfident)
4
shaky(uncertain, fear, nervous, shy, worried)
4
skittish(shy, worried, afraid, apprehensive, modesty)
4
tremulous(fear, nervous, shy, worried, fearful)
4
unassured(adjective, quiet, uncertain, shy, doubtful)
4
undemonstrative(adjective, quiet, gentle, modest, aloof)
4
unostentatious(adjective, person, soft, feelings, shy)
4
unpresuming(adjective, person, soft, feelings, shy)
4
wavering(adjective, uncertain, nervous, shy, doubtful)
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APASmart Define. (2016). diffident thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/diffident/thesaurus/synonyms
ChicagoSmart Define. 2016. "diffident thesaurus" https://smartdefine.org/diffident/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, diffident thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/diffident/thesaurus/synonyms>.
MLASmart Define. "diffident thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/diffident/thesaurus/synonyms>