wheel arch

US /ˈwiːl ɑːrtʃ/
UK /ˈwiːl ɑːrtʃ/
"wheel arch" picture
1.

the part of a vehicle's bodywork that curves over and around a wheel

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The mechanic repaired the damaged wheel arch on the car.
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Rust often starts to appear around the wheel arches.
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fendermudguard
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archarchedwheelsteering wheelpotter's wheelspinning wheelfifth wheel