The critic noted the play's many archnesses, which gave the characters a charmingly caustic edge.

The ARCH model revealed volatility clustering in the financial returns.

She gave him an archful smile that suggested she knew more than she said.

Arch decided to spend the afternoon repairing his grandfather's pocket watch.

The church's stained-glass window was set within a graceful lancet arch that caught the morning light.

The cathedral's Gothic arch cast a graceful shadow across the nave.

During the trial, he realized that his supposed ally was his arch-enemy in disguise.

The historic theater's proscenium arches were restored to their original gilded splendor during the renovation.

The architect chose a cycloidal arch for the new footbridge because its span can be set as a specific factor of π times the rise to optimize structural efficiency.

The surgeon carefully inspected the vertebral arch to locate the fracture.