How to pronounce “asynchronous”
Asynchronous is pronounced /ˈeɪˈsɪŋkrənəs/. It has 4 syllables, and the beat falls on the first one — eɪ. Below: the syllable split, native audio in both accents, the mistake people actually make with this word, and every individual sound in it explained.
Syllables and stress
Split it into 4 beats. The highlighted syllable is the strong one: say it louder, longer and a touch higher in pitch, and let the others fall away. English is a stress-timed language, so getting eɪ in the right place matters more to a listener than getting every vowel perfect.
Stress pattern OOoo — capital letters mark the stressed beats.
The common mispronunciation of “asynchronous”
✗ Often said: /ˈæsɪntʃrɑːnaʊs/ — the spelling, read straight off the page.
✓ Actually: /ˈeɪˈsɪŋkrənəs/
Why the two come apart: the unstressed vowels flatten all the way down to /ə/ — English swallows them, so they never sound the way they are written; also, at least one vowel does not say what its spelling suggests — English vowel letters are not reliable here; also, a consonant letter takes an unexpected sound value here, so reading it "as written" comes out wrong.
This is why reading English aloud from spelling alone goes wrong so often: the letters of “asynchronous” are not a reliable map of its sounds. The IPA is — each symbol stands for exactly one sound, every time.
“asynchronous” sound by sound
“asynchronous” is built out of 10 sounds. Say each one on its own first, slowly, then run them together at speed. Every sound links to a full guide with mouth position, the mistake learners make with it, and other words that use it.
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eɪStart at the /e/ position and glide upward and forward toward /ɪ/ — the jaw closes as you say it.
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sHold the tongue tip near (not touching) the ridge behind the upper teeth and force a narrow stream of air down the groove of the tongue.
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ɪRelax the tongue slightly lower and further back than for /iː/, keep the lips neutral, and make it short and lax.
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ŋRaise the back of the tongue against the soft palate as if for /ɡ/, but let the voiced air escape through the nose instead of releasing it.
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kRaise the back of the tongue to touch the soft palate, seal the air, then release it with a puff.
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rCurl the tongue tip back (or bunch the tongue body up) without touching anything, round the lips slightly, and voice — the tongue must never tap the roof of the mouth.
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əDo almost nothing: leave the tongue in its neutral resting position, mouth slightly open, and make the shortest, weakest possible vowel.
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nTouch the tongue tip to the ridge behind the upper teeth, lower the soft palate, and voice the air out through the nose.
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əDo almost nothing: leave the tongue in its neutral resting position, mouth slightly open, and make the shortest, weakest possible vowel.
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sHold the tongue tip near (not touching) the ridge behind the upper teeth and force a narrow stream of air down the groove of the tongue.
Questions people ask about “asynchronous”
- How do you pronounce “asynchronous”?
- “asynchronous” is pronounced /ˈeɪˈsɪŋkrənəs/, with the stress on the first syllable (eɪ). Press the US or UK button above to hear it spoken.
- How many syllables are in “asynchronous”?
- “asynchronous” has 4 syllables: eɪ · sɪŋ · krə · nəs. The stress pattern is OOoo.
- What is the common mispronunciation of “asynchronous”?
- People read it off the spelling as /ˈæsɪntʃrɑːnaʊs/, but it is actually /ˈeɪˈsɪŋkrənəs/, because the unstressed vowels flatten all the way down to /ə/ — English swallows them, so they never sound the way they are written.
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