How to pronounce “oscillator”
Oscillator is pronounced /ˈɑːsəˌleɪtər/. It has 4 syllables, and the beat falls on the first one — ɑː. 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 ɑː in the right place matters more to a listener than getting every vowel perfect.
Stress pattern Ooōo — capital letters mark the stressed beats.
The common mispronunciation of “oscillator”
✗ Often said: /ˈɑːskɪlætɔːr/ — the spelling, read straight off the page.
✓ Actually: /ˈɑːsəˌleɪtər/
Why the two come apart: the silent “c” in “sc” is not pronounced, even though the spelling begs you to say it; also, 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.
This is why reading English aloud from spelling alone goes wrong so often: the letters of “oscillator” are not a reliable map of its sounds. The IPA is — each symbol stands for exactly one sound, every time.
“oscillator” sound by sound
“oscillator” is built out of 7 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.
-
ɑːOpen the mouth wide, drop the tongue low and back, keep the lips unrounded, and hold it long — the doctor-says-"ahh" vowel.
-
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.
-
əDo almost nothing: leave the tongue in its neutral resting position, mouth slightly open, and make the shortest, weakest possible vowel.
-
lTouch the tongue tip to the ridge behind the upper teeth and let the voiced air flow around the sides of the tongue.
-
eɪStart at the /e/ position and glide upward and forward toward /ɪ/ — the jaw closes as you say it.
-
tTouch the tongue tip to the bumpy ridge just behind the upper teeth, block the air, then release it with a puff.
-
ərThe same r-coloured tongue shape as /ɜːr/ but weak, short and unstressed — the ending of "teacher", "doctor", "sugar".
Silent letters in “oscillator”
Letters you write but never say — this is the single biggest reason the word trips people up:
- cThe letter “c”Silent “c” in “sc” — write it, but do not let it reach your mouth.
Questions people ask about “oscillator”
- How do you pronounce “oscillator”?
- “oscillator” is pronounced /ˈɑːsəˌleɪtər/, with the stress on the first syllable (ɑː). Press the US or UK button above to hear it spoken.
- How many syllables are in “oscillator”?
- “oscillator” has 4 syllables: ɑː · sə · leɪ · tər. The stress pattern is Ooōo.
- What is the common mispronunciation of “oscillator”?
- People read it off the spelling as /ˈɑːskɪlætɔːr/, but it is actually /ˈɑːsəˌleɪtər/, because the silent “c” in “sc” is not pronounced, even though the spelling begs you to say it.
- Does “oscillator” have any silent letters?
- Yes — silent “c” in “sc”.
Stop looking words up one at a time
You just looked up one word. PHONO puts the IPA above every word of whatever you are reading — in your browser, in a PDF, in any app — the moment you select it. An offline pronunciation dictionary, US and UK audio, one hotkey.