She flashed an arch smile, as if she knew a secret.

When the arch took his seat beneath the old oak, even the youngest children bowed in respect.

For years, the scientist considered the corporation to be the arch-enemy of his environmental research.

The arched bridge cast a graceful shadow across the river at sunset.

She arched her brow when she heard the surprising news.

In many compound words, the suffix -arch signals a leader or ruler.

The ancient cathedral's arches cast intricate shadows across the stone floor.

The cat arches its back when it feels threatened.

Her archness made the playful reprimand land with a wink rather than a rebuke.

The arching midsection of the ship indicated hogging rather than sagging.