4
inaudible(adjective, obscure)
2
unhearable
1
indistinct(adjective, obscure)
1
silent
1
unclear(adjective, obscure)
1
vague(adjective, obscure)
1
voiceless
0
ambiguous(adjective, obscure)
0
breathed
0
feeble
0
imperceptible
0
inapprehensible
0
inarticulate
0
incomprehensible
0
indefinite
0
inexpressible
0
infrasonic
0
invisible(adjective, obscure)
0
low
0
obscure
<12>
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APASmart Define. (2015). hearable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/hearable/thesaurus/antonyms
ChicagoSmart Define. 2015. "hearable thesaurus" https://smartdefine.org/hearable/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, hearable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/hearable/thesaurus/antonyms>.
MLASmart Define. "hearable thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/hearable/thesaurus/antonyms>