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Pronunciation varies by accent · noun
Either of a pair of related synthetic pyrethroids used in insecticides to paralyse the nervous system..
Use allethrin when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Allethrin means Either of a pair of related synthetic pyrethroids used in insecticides to paralyse the nervous system..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use allethrin where its definition matches the intended context.
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