

He is the arch enemy of the hero.
Chief or principal; often used to describe something that is the most important.
She is the arch rival in the competition.
The arch villain plotted against the city.
He is known as the arch leader of the group.
arch enemy
arch rival
arch villain
chief
principal
main
She will arch her back to stretch.
To form or cause to form a curve or arch shape.
The cat will arch its back when it feels threatened.
He likes to arch his eyebrows in surprise.
The bridge will arch over the river.
arch your back
arch a doorway
arch a bridge
curve
bend
vault
The arch over the door is beautiful.
A curved structure that supports weight, often found in buildings or bridges.
The stone arch is very old.
They walked under the arch in the park.
The bridge has a tall arch.
stone arch
door arch
arched structure
curve
archway
vault