55 entries under adverb topic. ×

2
pertinaciously
2
pigheadedly(firmly, determinedly, fixedly, obstinately)
2
strictly
2
tenaciously
2
toughly
2
uncompromisingly
2
unwaveringly(definitely, resolutely, determinedly, obstinately)
1
austerely
1
contrarily
1
contumaciously
1
harshly
1
immutably
1
implacably
1
indomitably
1
inelastically
1
inexorably
1
severely
1
sternly
0
callously
0
constantly
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APASmart Define. (2015). inflexibly thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/inflexibly/thesaurus/synonyms
ChicagoSmart Define. 2015. "inflexibly thesaurus" https://smartdefine.org/inflexibly/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, inflexibly thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/inflexibly/thesaurus/synonyms>.
MLASmart Define. "inflexibly thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/inflexibly/thesaurus/synonyms>