intricate; complex.

curled or curved inward or spirally.

Botany . rolled inward from the edge, as a leaf.

Zoology . (of shells) having the whorls closely wound.

Geometry . any curve of which a given curve is the evolute.

to roll or curl up; become involute.

to return to a normal shape, size, or state.

adjective

byzantine , complicated , convoluted , daedal , daedalian , elaborate , intricate , involved , knotty , labyrinthine , tangled