10
unfortunately(adverb, manner, criticism, unthankfulness, unthanfulness)
6
thanklessly(adverb, manner, criticism, unthankfulness, unthanfulness)
5
unappreciatively(manner, criticism, adverb, unthankfulness, unthanfulness)
5
ungratefully(adverb, manner, criticism, unthankfulness, unthanfulness)
5
unthankfully(manner, criticism, adverb, unthankfulness, unthanfulness)
4
critically(manner, criticism, adverb, unthankfulness, unthanfulness)
4
rudely(adverb, manner, criticism, ungratefully, unthankfulness)
4
sadly(manner, criticism, adverb, unthankfulness, unthanfulness)
4
unhappily(adverb, manner, criticism, unthankfulness, unthanfulness)
4
unluckily(adverb, manner, criticism, unthankfulness, unthanfulness)
3
regrettably(adverb, manner, criticism, unthankfulness)
2
aggrievedly(manner, criticism, unthankfulness, adverb)
2
discouragingly(manner, criticism, unthankfulness, adverb)
2
distastefully(adverb, manner, criticism, unthankfulness)
2
grudgingly(adverb, manner, criticism, unthankfulness)
2
grumblingly(manner, criticism, unthankfulness, adverb)
2
grumpily(manner, criticism, unthankfulness, adverb)
2
harshly(adverb, manner, criticism, unthankfulness)
2
offensively(adverb, manner, criticism, unthankfulness)
2
reluctantly(adverb, manner, criticism, unthankfulness)
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APASmart Define. (2013). thankfully thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/thankfully/thesaurus/antonyms
ChicagoSmart Define. 2013. "thankfully thesaurus" https://smartdefine.org/thankfully/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2013, thankfully thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/thankfully/thesaurus/antonyms>.
MLASmart Define. "thankfully thesaurus" 17 June 2013. Web. 24 September 2026. <https://smartdefine.org/thankfully/thesaurus/antonyms>