spiky 
/ˈspaɪki/ adjective
spik·i·er; spik·i·est /ˈspaɪki/ adjective 1 : having sharp points : formed into points
▪ He has short, spiky [=spiked] hair. ▪ a plant with spiky leaves 2 Brit, informal : tending to become angry or annoyed easily
▪ He has a spiky personality.
▪ He has short, spiky [=spiked] hair. ▪ a plant with spiky leaves
▪ He has a spiky personality.
