0
unmeaning(reasonable, substantial)
0
unoccupied
0
unopened
0
unproductive
0
unprofitable
0
unpurposed(reasonable, substantial)
0
unsubstantial(adjective, little, meaningless)
0
unsuccessful
0
unsuccessful person
0
unwise
0
uselessness
0
vacant
0
windy
0
without rhyme or reason(expression, idiom, reasonable)
0
yeasty
0
zipper(substantial, useful)
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APASmart Define. (2016). meaningful thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/meaningful/thesaurus/antonyms
ChicagoSmart Define. 2016. "meaningful thesaurus" https://smartdefine.org/meaningful/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, meaningful thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/meaningful/thesaurus/antonyms>.
MLASmart Define. "meaningful thesaurus" 29 March 2016. Web. 28 September 2026. <https://smartdefine.org/meaningful/thesaurus/antonyms>