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25 entries under complex topic. ×

1
abstract(hard, delicate, tricky, complicated)
1
baffling(hard, delicate, tricky, complicated)
1
confounding(hard, difficult, delicate, tricky)
1
confusing(hard, difficult, delicate, tricky)
1
deep(hard, delicate, tricky, complicated)
1
enigmatical(hard, difficult, delicate, tricky)
1
esoteric(hard, delicate, tricky, complicated)
1
formidable(hard, delicate, tricky, complicated)
1
hard to explain(expression, idiom, hard, delicate)
1
loose(hard, delicate, tricky, complicated)
1
mystical(hard, delicate, tricky, complicated)
1
mystifying(hard, delicate, tricky, complicated)
1
paradoxical(hard, difficult, delicate, tricky)
1
problematical(hard, delicate, tricky, complicated)
1
profound(hard, delicate, tricky, complicated)
1
subtle(hard, delicate, tricky, complicated)
1
thorny(hard, delicate, tricky, complicated)
1
ticklish(hard, delicate, tricky, complicated)
1
vexing(hard, delicate, tricky, complicated)
0
delicate(hard, tricky, complicated, troublesome)
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APASmart Define. (2011). hard to solve thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/hard_to_solve/thesaurus/synonyms
ChicagoSmart Define. 2011. "hard to solve thesaurus" https://smartdefine.org/hard_to_solve/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2011, hard to solve thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/hard_to_solve/thesaurus/synonyms>.
MLASmart Define. "hard to solve thesaurus" 21 May 2011. Web. 22 September 2026. <https://smartdefine.org/hard_to_solve/thesaurus/synonyms>