arch1
n.
- a curved symmetrical structure spanning an opening and supporting the weight of a bridge, roof, or wall.
▸an arch-shaped curve.
- the inner side of the foot.
v.
form or cause to form an arch.
Derivative
Etymology
ME: from OFr. arche, based on L. arcus ‘bow’.
arch2
adj.
self-consciously playful or teasing.
Derivative
Etymology
C17: from arch-, by assoc. with the sense ‘rogue’ in combinations such as arch-scoundrel.