Part of speech: Adjective
marked by repeated turns and bends
Example: a tortuous road up the mountain; winding roads are full of surprises; had to steer the car down a twisty track
Part of speech: Adjective
not straightforward
Example: his tortuous reasoning
The word "tortuous" comes from Latin tortuōsus. It started in Old French tortuos. Then it appeared in Middle English tortuous.
A word passing through this many languages survived because it named something universally important.