ثنية

Noun

 * 1) duplicature, tuck, pleat, fold, twist

Noun

 * 1) dale, mountain pass
 * 2) fold, crease, plait
 * 3) inward side, inside
 * 4) incisor, any of front teeth

Etymology
From.

Noun

 * 1) a bend
 * 2) a fold clothing