- arched - constructed with or in the form of an arch or arches; "an arched passageway"
- arced, arched, arching, arciform, arcuate, bowed - forming or resembling an arch; "an arched ceiling"
Antonym: straight (indirect, via curved)
- arced, arched, arching, arciform, arcuate, bowed - forming or resembling an arch; "an arched ceiling"