1. Highly complex or intricate and occasionally devious
   "tortuous legal procedures"; "tortuous negotiations lasting for months"
   - Byzantine, convoluted, involved, knotty, tangled 
2. Marked by repeated turns and bends
   "a tortuous road up the mountain"
   - twisting, twisty, winding, voluminous 
3. Not straightforward
   "his tortuous reasoning"

See also: complex, crooked, indirect, tortuousness

Encyclopedia: Tortuous

• Three Kings' Day
• three sheets to the wind
• three times
• three-bagger
• three-banded armadillo
• three-base hit
• three-card monte
• three-centered arch
• three-cornered
• three-cornered leek
• three-d
• three-day event
• three-day measles
• three-decker
• three-dimensional
• three-dimensional figure
• three-dimensional radar
• three-dimensionality
• three-figure
• three-fourths
• three-hitter
• three-hundredth
• three-lane
• three-legged
• three-lipped