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Tormentous (adjective)
Involving or causing torment; having the nature of torture.
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Tortuous (adjective)
Twisted; having many turns; convoluted.
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Tortuous (adjective)
Oblique; applied to the six signs of the zodiac (from Capricorn to Gemini) that ascend most rapidly and obliquely.
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Tortuous (adjective)
Injurious; tortious.
Wiktionary
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Tortuous (adjective)
full of twists and turns
“the route is remote and tortuous”
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Tortuous (adjective)
excessively lengthy and complex
“a tortuous argument”
Oxford Dictionary