Hard to solve synonyms

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Synonyms for hard to solve
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wrench, spanner, repair
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Synonyms for Hard to solve. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/synonyms/hard_to_solve
Synonyms for Hard to solve. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/synonyms/hard_to_solve>.
Synonyms for Hard to solve. 2016. Accessed August 15, 2026. https://thesaurus.plus/synonyms/hard_to_solve.