4
mysteriously(adverb, strangely, curiously, puzzlingly)
3
vaguely
2
inconceivably
2
inexplicable
2
oddly(adverb, unusually, strangely, curiously, mysteriously)
2
peculiarly(adverb, unusually, strangely, curiously, mysteriously)
2
unexplainably
2
without explanation(expression, idiom, adverb, strangely, curiously)
1
aimlessly
1
impenetrably
1
incomprehensibly
1
unexplainedly
1
abnormally
1
at random
1
bafflingly(adverb, strangely, curiously)
1
enigmatically
1
excessively
1
haphazardly
1
indecipherably
1
inscrutably
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APASmart Define. (2015). inexplicably thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/inexplicably/thesaurus/synonyms
ChicagoSmart Define. 2015. "inexplicably thesaurus" https://smartdefine.org/inexplicably/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, inexplicably thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/inexplicably/thesaurus/synonyms>.
MLASmart Define. "inexplicably thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/inexplicably/thesaurus/synonyms>