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Pronunciation varies by accent · noun
An opioid analgesic drug that is an analog of fentanyl..
Use acetylfentanyl when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Acetylfentanyl means An opioid analgesic drug that is an analog of fentanyl..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use acetylfentanyl where its definition matches the intended context.
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