56 entries under weak topic. ×

21
indistinct(adjective, dull, hard, soft)
15
faint(adjective, calm, dull, quiet)
14
slight(adjective, calm, dull, hard)
14
obscure(adjective, pale, subtle, hidden)
12
inaudible(adjective, dull, quiet, hard)
12
vague(adjective, dull, hard, soft)
11
ill-defined(adjective, pale, insensible, faded)
9
gentle(adjective, calm, dull, soft)
9
unclear(adjective, dull, quiet, soft)
8
feeble(adjective, calm, dull, quiet)
6
dim(adjective, dull, soft, gentle)
5
blurred(adjective, pale, faded)
4
dull(adjective, soft, gentle, low)
4
hazy(adjective, pale, faded)
4
low(adjective, calm, dull, quiet)
4
pale(adjective, dull, soft, gentle)
4
shadowy(adjective, hard, faint, pale)
4
tenuous(slight, fine, thin, pale)
3
moderate(adjective, calm, dull, quiet)
3
muffled(adjective, dull, quiet, soft)
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APASmart Define. (2015). imperceptible thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/imperceptible/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperceptible thesaurus" https://smartdefine.org/imperceptible/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, imperceptible thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/imperceptible/thesaurus/synonyms>.
MLASmart Define. "imperceptible thesaurus" 13 April 2015. Web. 27 September 2026. <https://smartdefine.org/imperceptible/thesaurus/synonyms>