22 entries under adjective topic. ×

6
unfathomable(hard, difficult, limited, bottomless)
3
incomprehensible
3
inscrutable
2
bottomless
2
fathomless
2
limitless(limited, little)
1
abysmal
1
boundless
1
deep
1
impenetrable
1
inconceivable(reasonable, belief, imaginable)
1
infinite
1
profound
1
recondite
1
unintelligible
0
enormous
0
eternal
0
immeasurable
0
incalculable
0
soundless
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APASmart Define. (2016). fathomable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/fathomable/thesaurus/antonyms
ChicagoSmart Define. 2016. "fathomable thesaurus" https://smartdefine.org/fathomable/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, fathomable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/fathomable/thesaurus/antonyms>.
MLASmart Define. "fathomable thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/fathomable/thesaurus/antonyms>