11 entries under plain topic. ×

2
clear
1
explicable(adjective, clear)
1
obvious(adjective, clear)
0
explainable(adjective, clear)
0
intelligible(adjective, clear)
0
penetrable(adjective, clear, watertight, enigmatical)
0
permeable(adjective, clear)
0
porous(adjective, clear)
0
soft(adjective, clear)
0
thin(adjective, clear)
0
understandable(adjective, clear)
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APASmart Define. (2015). unknowable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unknowable/thesaurus/antonyms
ChicagoSmart Define. 2015. "unknowable thesaurus" https://smartdefine.org/unknowable/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unknowable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unknowable/thesaurus/antonyms>.
MLASmart Define. "unknowable thesaurus" 13 April 2015. Web. 23 September 2026. <https://smartdefine.org/unknowable/thesaurus/antonyms>