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