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antiknock▼(reducing the occurrence of engine knock)adjective[UK: ˌænt.i.ˈnɒk] [US: ˌænt.i.ˈnɑːk]
antiknock▼(substance to reduce the occurrence of engine knock)noun[UK: ˌænt.i.ˈnɒk] [US: ˌænt.i.ˈnɑːk]
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