57 entries under diffident topic. ×

2
overmodest(adjective, shy, timid)
2
sheepish(adjective, quiet, simple, modest, nervous)
2
shrinking(adjective, quiet, modest, nervous, humble)
2
spineless(adjective, weak, nervous, shy, meek)
2
unassured(adjective, quiet, modest, nervous, humble)
1
abashed(adjective, shy, timid)
1
afraid(adjective, weak, modest, nervous, humble)
1
apprehensive(adjective, modest, nervous, humble, shy)
1
blushful(adjective, shy, timid)
1
chary(adjective, modest, humble, shy, hesitant)
1
confused(adjective, shy, timid)
1
conscious(adjective, modest, nervous, humble, hesitant)
1
constrained(adjective, shy, meek, yielding, submissive)
1
cowering(adjective, weak, nervous, shy, meek)
1
embarrassed(adjective, shy, timid)
1
frightened(adjective, weak, nervous, shy, meek)
1
having cold feet(expression, adjective, idiom, weak, nervous)
1
intimidated(adjective, weak, nervous, shy, meek)
1
introvert(adjective, modest, nervous, humble, hesitant)
1
loner(adjective, modest, nervous, humble, hesitant)
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APASmart Define. (2016). unassertive thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unassertive/thesaurus/synonyms
ChicagoSmart Define. 2016. "unassertive thesaurus" https://smartdefine.org/unassertive/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, unassertive thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unassertive/thesaurus/synonyms>.
MLASmart Define. "unassertive thesaurus" 24 March 2016. Web. 20 September 2026. <https://smartdefine.org/unassertive/thesaurus/synonyms>