arch

A semi-circle shape, like an inverted "U".

Example: Robert drew an arch on the paper.

Any object having the shape of an arch, from stone bridges and doorways to bows.

Example: They went through the arch into the church.

A part of the foot, on the bottom, which is shaped like an arch.

Example: She stepped on a nail and hurt the arch of her foot.

To make into the shape of an arch.

Example: The cat arched its back.

Arch added to the start of a word signifies it is important or the most important

Example: An archbishop is a senior bishop.