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How to pronounce efficacious in American English
“efficacious” pronunciation by American speakers
Listen to efficacious the way American speakers say it — in real sentences from public video clips that play here, on YouTongue.
Hear “efficacious” in: all accents
“efficacious” in real sentences — American speakers
239 clips in the index. Clips come from public YouTube videos — parliaments, government agencies and independent channels.
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vaccine is safe and efficacious.
NIH
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been shown to be efficacious over.
CDC
Why real speech
A dictionary gives you one careful reading of efficacious. Conversation gives you the stress, the vowel reduction and the speed that people actually use — and they differ between accents. YouTongue plays the surrounding sentence, so you hear the word in the rhythm it belongs to.