Scientists warn that biodiversity loss poses existential threats.

Words 8 Difficulty Intermediate Featured sound Flap T
SAHY·uhn·tuhsts scientists WORN warn dhuht that bahy·oh·duh·VUR·suh·tee biodiversity LAHS loss POH·zuhz poses ehg·zuh·STEHN·shuhl existential THREHTS threats
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In casual American English, "Scientists warn that biodiversity loss poses existential threats" sounds like "SAHY-uhn-tuhsts WORN dhuht bahy-oh-duh-VUR-suh-tee LAHS POH-zuhz ehg-zuh-STEHN-shuhl THREHTS". Several things happen here, and the headline one is the Flap T: the T between vowels turns into a quick D-like flap. Keep stressed words long, unstressed words short, and link the consonants forward into the vowels.

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Common mistakes

Pronouncing the silent T after N.

In "scientists", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound. /t/ is completely silent — the tongue skips the T stop and moves directly from the N position to the next sound.

Pronouncing the T in a consonant cluster.

In "scientists", the "t" is squeezed between other consonants and drops out — the surrounding consonants flow together without it — most natural in flowing, casual speech; in careful or formal speech, the T may be lightly present. /t/ is dropped entirely — the surrounding consonants flow together without the T.

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Why it sounds different

What makes this sentence sound American.

In "biodiversity", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. This is called the Flap T, a hallmark of natural-sounding American speech. It comes out as bahy-oh-duh-VUR-suh-tee.

The breakdown

What's happening in this sentence.

Small tricks that turn a textbook sentence into how an American actually says it.

t→∅
Silent T after N in "scientists"In "scientists", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound.
t→∅
Silent T in Clusters in "scientists"In "scientists", the "t" is squeezed between other consonants and drops out — the surrounding consonants flow together without it — most natural in flowing, casual speech; in careful or formal speech, the T may be lightly present.
ə→◌
Silent Schwa Before L/M/N/R in "scientists"Schwa is absorbed — consonant becomes the syllable nucleus.
•
Unreleased Stops in "that"Air stops but there's no release burst — the articulators hold position.
t→ɾ
Flap T in "biodiversity"In "biodiversity", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth.
⌣
Consonant-to-Vowel Linking between "poses" & "existential"Final consonant "migrates" to next word — no pause between.
Word by word

Tap any word for its full breakdown.

Each word has its own page with examples, common mistakes, and related words.

scientists SAHY·uhn·tuhsts warn WORN that dhuht biodiversity bahy·oh·duh·VUR·suh·tee loss LAHS poses POH·zuhz existential ehg·zuh·STEHN·shuhl threats THREHTS
Watch out

Common pronunciation mistakes in American English.

The textbook way isn't wrong — it's just not how anyone actually says it.

01

Pronouncing the silent T after N.

In "scientists", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound. /t/ is completely silent — the tongue skips the T stop and moves directly from the N position to the next sound.

SAHY-uhn-tuhsts→SAHY·uhn·tuhsts
02

Pronouncing the T in a consonant cluster.

In "scientists", the "t" is squeezed between other consonants and drops out — the surrounding consonants flow together without it — most natural in flowing, casual speech; in careful or formal speech, the T may be lightly present. /t/ is dropped entirely — the surrounding consonants flow together without the T.

SAHY-uhn-tuhsts→SAHY·uhn·tuhsts
03

Saying a hard "T" in the middle.

In "biodiversity", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. /t/ or /d/ becomes a quick tap [ɾ] — sounds like a soft D. The tongue briefly taps the ridge behind the upper teeth.

bahy-oh-tuh-VUR-suh-tee→bahy·oh·duh·VUR·suh·tee
04

Treating every L the same.

The L in "existential" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. Dark L adds a small schwa-like "uh" before the L. The back of the tongue lifts toward the soft palate.

ehg-zuh-STEHN-shuhl→ehg·zuh·STEHN·shuhl
Questions

Questions people ask about this.

Why do the T sounds turn into D-like sounds in this sentence?
That's the flap-T rule: when /t/ sits between two vowels — inside a single word, or across the boundary between two words — Americans replace the crisp T with a quick D-like flap. It's one of the most distinctive sounds of casual American speech and one of the first things to copy if you want to sound less textbook.
How are the words connected in casual American speech?
Americans don't pause between words. A consonant at the end of one word links forward into the vowel that starts the next; two vowels in a row get bridged by a tiny W or Y glide; an identical consonant repeated across a word boundary is held just once. The result is a continuous flow rather than a textbook word-by-word delivery.
Is this how the sentence is taught in textbooks?
Textbooks usually teach the citation form — every word pronounced fully, every consonant crisp, every vowel pure. Americans actually flap their Ts, drop function-word H's, link consonants forward into vowels, and reduce unstressed syllables to schwa. The respell on this page shows the casual form you'll hear in real conversations rather than the textbook version.

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