arch - noun

a curved shape in the vertical plane that spans an opening

a curved bony structure supporting or enclosing organs (especially the inner sides of the feet)

a passageway under a curved masonry construction

(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it

arch - verb

• form an arch or curve

arch - adjective

• (used of behavior or attitude) characteristic of those who treat others with condescension
• expert in skulduggery
• naughtily or annoyingly playful

arch - thesaurus

arc   archway   condescending   curve   impish   implike   mischievous   patronising   patronizing   pixilated   prankish   puckish   wicked