In casual American English, "Certainly, the service was worthy of hurt" sounds like "SUR-tuhn-lee dhuh SUR-vuhs wuhz WUR-dhee uhv HURT". Several things happen here, and the headline one is the Glottal T: the T closes off into a tiny silent pause instead of a clean release. Keep stressed words long, unstressed words short, and link the consonants forward into the vowels.
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What makes this sentence sound American.
In "certainly", the "t" before the syllabic nasal becomes a glottal stop — a catch in the throat where the schwa drops and the nasal becomes syllabic. This is called the Glottal T, the kind of sound shift that makes everyday speech feel effortless. It comes out as SUR-tuhn-lee.
What's happening in this sentence.
Small tricks that turn a textbook sentence into how an American actually says it.
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Common pronunciation mistakes in American English.
The textbook way isn't wrong — it's just not how anyone actually says it.
Releasing the T before the syllabic N.
In "certainly", the "t" before the syllabic nasal becomes a glottal stop — a catch in the throat where the schwa drops and the nasal becomes syllabic. /t/ becomes a glottal stop [ʔ] — a catch in the throat. The schwa in the following syllable is dropped, making the nasal syllabic.
Releasing the final consonant with a puff of air.
In "hurt", the "" is not released — the articulators get into position but hold without the burst of air. Air stops but there's no release burst — the articulators hold position.
Inserting a vowel before the syllabic consonant.
In "certainly", the short unstressed vowel before "" disappears — the schwa is absorbed and the "" becomes the syllable nucleus on its own. Schwa is absorbed — consonant becomes the syllable nucleus.
Leaving a gap between two vowels.
Between "" and "", a brief "" glide bridges the two vowels for smooth flow. A brief glide (y or w) bridges two vowels for smooth flow.