rusted
v. B1 Intermediate US //ˈɹəstɪd// UK //ɹˈʌstɪd// rust·ed
v. to become covered in a brown, flaky layer because of being in the rain or water for too long. It happens to metal like iron.
v. to undergo oxidation, particularly the formation of iron oxide, as a result of exposure to moisture and air. Often used in the passive voice to describe the state of metal objects.
The old gate has rusted shut.
The car sat in the garage for years and eventually rusted through the floor.
The bridge's structural integrity was compromised when the steel beams rusted after the protective coating failed during the heavy monsoon season.