How to pronounce mass in American English
MAS
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Americans pronounce mass as MAS (/mæs/).
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Why it sounds different
Why "mass" sounds like MAS.
The "" at the end of "" flows directly into the vowel starting "" — the consonant migrates to the next word with no pause between. This is called the Consonant-to-Vowel Linking, how Americans glue words together so they sound like one phrase. It comes out as MAS.
In real conversation
Hear "mass" in the wild.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.
"Dark matter makes up a large portion of the universe's mass."
DARK MA·der MAYKS UHP uh LARJ POR·shuhn uhv dhuh YOO·nuh·vur·suhz MAS
"Lifting weights builds muscle mass and bone density."
LIHF·tuhng WAYTS BIHLDZ MUH·suhl MAS and BOHN DEHN·suh·tee
"She balanced the chemical equation to show the conservation of mass."
shee BA·luhnst dhuh KEH·muh·kuhl ih·KWAY·zhuhn tuh SHOH dhuh kahn·ser·VAY·shuhn uhv MAS
Questions
Questions people ask about this.
Is the American pronunciation of "mass" different from British English?
American English uses different vowel shapes, a relaxed retroflex R, and connected-speech tricks like flap-T and glottal-stop T that British Received Pronunciation generally avoids. The respell "MAS" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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