[ 'sə:p(ə)ntʌɪn ]
■ adjective of or like a serpent or snake.
↘winding and twisting.
↘complex, cunning, or treacherous.
■ noun
1》 a dark green mineral consisting of hydrated magnesium silicate, sometimes mottled or spotted like a snake's skin.
2》 a riding exercise consisting of a series of half-circles made alternately to right and left.
3》 historical a kind of cannon.
■ verb move or lie in a winding path or line.