3
embryonic
3
even(adjective, gradual)
3
indefinite
3
little(adjective, amount, size)
3
moderate(adjective, calm, dull, quiet, weak)
3
molecular
3
muffled(adjective, dull, quiet, weak, soft)
3
muted(adjective, calm, dull, quiet, weak)
3
negligible(adjective, slight, fine, thin, short)
3
out of sight(expression, idiom)
3
quiet(adjective, calm, dull, weak, smooth)
3
slow(adjective, calm, quiet, smooth, soft)
3
small(adjective, hard, faint)
3
soft(adjective, calm, dull, quiet, weak)
3
subdued(adjective, calm, dull, quiet, weak)
3
viewless
2
anesthetic
2
distant(adjective, dull, weak, soft, gentle)
2
ethereal(adjective, slight, fine, thin, insubstantial)
2
faded(adjective, weak, pale)
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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>