How to pronounce the Long O sound /oʊ/
/oʊ/ is a diphthong — a vowel that glides, moving back, mid to high (glide). Start on a mid 'oh' with the lips loosely rounded. Glide the tongue up and back toward the 'oo' of 'food'.
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How to make it
- 1Start on a mid 'oh' with the lips loosely rounded.
- 2Glide the tongue up and back toward the 'oo' of 'food'.
- 3Tighten the lip ring as you move — the rounding increases through the sound.
- 4Never flatten it to a single 'aw': 'boat' would become 'bought'.
- Lips
- Start loosely rounded, then tighten into a ring.
- Tongue
- Starts back and mid, glides up and back.
- Jaw
- Starts half open, closes through the glide.
Feel it
Put a hand flat on your throat and say the sound. It should buzz under your fingers from the very start — if the buzz only arrives with the vowel, you are making the voiceless version.Where the sound appears
Keeping it through a whole line
I know the old boat goes slowly over the ocean.
Open the window at home before you go.
Minimal pairs to drill
Each of these is two words separated by exactly one sound. If a listener hears the wrong one, the problem is the contrast, not the effort.
If your first language is…
Nothing here is about ability. Every one of these is a sound system doing exactly what it was built to do, applied to a language that asks for something else.
- HindiUrdu
Hindi and Urdu have a steady long o, so English 'go' often arrives without the closing glide.
- Mandarin
Mandarin has an ou diphthong close to this one, so it transfers well.
- Japanese
Japanese long o is steady, so 'slowly' loses both glides.
- Korean
Korean o is steady, so the glide has to be added.
- Vietnamese
Vietnamese has a close back rounded vowel with a slight glide, so this transfers reasonably well.
- Spanish
Spanish o is a single steady vowel, so 'boat' loses its glide and can sound like 'bought'.
- French
French o is steady too, so 'home' can sound flat.
- German
German long o is steady, so the English glide is usually missing.
- Italian
Italian o stays steady, so the glide has to be added.
- Russian
Russian o is steady when stressed and reduces when not, so English 'window' can lose its second vowel.
- Arabic
Arabic has an aw sequence in many varieties but no oʊ, so the English glide is usually flattened.
- Turkish
Turkish o is steady, so 'open' loses the glide.
Straight answers
Is /oʊ/ voiced or voiceless?
It is voiced. Put a hand on your throat and say it: you should feel a buzz the whole time. All English vowels are voiced, so the question only really separates the consonants.
What words start with the Long O sound?
Common ones include open, over, only. In the middle of a word you get home, boat, slowly, and at the end go, know, window. Every one of those links to its own pronunciation page here.
How is /oʊ/ spelled in English?
It is written "o_e", "oa", "ow", "o", "oe", "ough". English spelling and English sound came apart centuries ago, so the same sound turns up under several spellings and the same spelling carries several sounds — which is why the sound, not the letter, is the thing to learn.
Why do Hindi & Urdu speakers find /oʊ/ hard?
Hindi and Urdu have a steady long o, so English 'go' often arrives without the closing glide.
Record the Long O sound and see if it landed
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