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Pronunciation varies by accent · adjective
Of an additive added to petroleum/gasoline to reduce the occurrence of engine knock..
Use antiknock when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Antiknock means Of an additive added to petroleum/gasoline to reduce the occurrence of engine knock..
Common synonyms include leaded.
The opposite depends on the specific sense.
Use antiknock where its definition matches the intended context.
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