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• 'The rude bridge that ___ the flood'

• Bent over backward

• Colosseum entrance, e.g.

• Curved

• Curved, as a sole

• Eyebrow-shaped

• Having a curved doorway

• Like a curious eyebrow

• Like a frightened cat's back

• Like a gateway, often

• Like a vault

• Like an angry cat's back

• Like an insole

• Like an upraised eyebrow

• Like many doorways

• Like Sam Donaldson's eyebrows

• Like some eyebrows

• Vaulted