3 syllables: Stra, to, sphere. Stress on Stra.
STRAT-uh-sfir
/ˈstɹætəˌsfɪɹ/
Stratosphere is pronounced STRAT-uh-sfir (/ˈstɹætəˌsfɪɹ/). It has three syllables (Stra-to-sphere), with the stress on "Stra". Stratosphere is the second major layer of Earth’s atmosphere, lying above the troposphere and below the mesosphere, characterized by a stable, stratified temperature profile. It extends roughly from 10 to 50 kilometers (6 to 31 miles) above the surface. The term emphasizes a distinct atmospheric zone where industrial stratospheric phenomena, like ozone concentration, occur. As a noun, it’s used both scientifically and metaphorically to mean a very high, elevated level of achievement or speculation.
nounStratosphere is the second major layer of Earth’s atmosphere, lying above the troposphere and below the mesosphere, characterized by a stable, stratified temperature profile. It extends roughly from 10 to 50 kilometers (6 to 31 miles) above the surface. The term emphasizes a distinct atmospheric zone where industrial stratospheric phenomena, like ozone concentration, occur. As a noun, it’s used both scientifically and metaphorically to mean a very high, elevated level of achievement or speculation.
- You often merge STRAT and the following schwa, saying STRAT-sf-AIR; slow down to separate STRAT-uh-SFIR. - You drop the /s/ in the /sf/ cluster or mispronounce it as /f/ or /s/; keep both consonants clear. - Final /r/ may be softened or dropped in non-rhotic accents; practice a light but audible rhotic ending if your accent is rhotic. - Ensure the second syllable has a distinct vowel: /ə/ rather than a full vowel like /oʊ/ or /æ/.
How to Pronounce Stratosphere
"Researchers collected data from the stratosphere to study ozone depletion."
"The company’s growth took initiative to a stratosphere level, far beyond initial forecasts."
"Artists aimed for the stratosphere of innovation, pushing beyond conventional limits."
Pronounce as /ˈstræt.əˌsfɪr/ (US) or /ˈstræt.əˌsfɪə/ (UK). Start with STRAT as in 'strike' plus 'at' quickly, then a light unstressed schwa, followed by S-FIR with a clear 'f' and 'r' at the end. The primary stress is on the first syllable, with a secondary stress on the 'sfɪr' portion. Try saying STRAT-uh-SFERE with careful consonant timing. Audio cues: [stress on STRAT], final /r/ pronounced in rhotic variants.
Common mistakes: (1) Skipping the unstressed schwa after STRAT, making STRAT-SFIRE run together. (2) Dropping the /s/ in the /sf/ cluster or turning /sf/ into /f/ or /s/ alone. (3) Misplacing the secondary stress on 'sfɪr' or flattening it. Correct by pronouncing STRAT-uh-SFIR with a distinct /sf/ blend and keeping the final /r/ clear in rhotic accents.
In US English, you hear /ˈstræt.oʊˌsfɪr/ with a more rounded 'oʊ' in the second syllable and rhotic final /r/. UK English features a shorter vowel in the second syllable /ˈstræ.təˌsfɪə/ with non-rhoticity in many dialects, producing a trailing /ə/ and a non-pronounced /r/. Australian English generally aligns with non-rhotic tendencies but keeps a delineated /sfɪə/ ending; diphthongs may be less pronounced, and the initial STRAT is crisp. Pay attention to /sf/ facilitation in all accents.
Key challenges are the /str/ onset cluster, the mid syllable schwa after STRAT, and the /sf/ consonant blend into a trailing /ɪr/ or /ɪə/ depending on accent. Coordinating the rapid transition from a stressed, strong first syllable to a muted secondary segment without deleting the /s/ and /f/ is tricky. Practice by isolating STRAT, then blending into /sfɪr/ with a short, crisp release of /s/ and /f/ before the final /r/.
No silent letters in standard pronunciations. Each concern is articulatory: pronounce STRAT clearly, the vowel in the schwa position is reduced and not silent, and the /sf/ cluster is fully pronounced before the final /ɪr/ or /ɪə/. Ensure the /t/ in STRAT is released rather than fully silent; the word is phonemically /ˈstræt.əˌsfɪər/ or /ˈstræt.əˌsfɪr/ depending on accent.
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- US: emphasize rhotic /r/ at the end; keep /oʊ/ or /ə/ as a quick, unstressed gut between STRAT and SF. - UK: non-rhotic tendency, ilicit /ˈstræ.tə.sfɪə/ where final /r/ is not pronounced; stress remains on the first syllable with a light second syllable. - AU: often non-rhotic; maintain crisp STRAT onset and a clear /sfɪə/ ending; keep diphthongs distinct but not overly broad. Use IPA references to tune vowel qualities and rhotics.
Stratosphere derives from the Greek stratós, meaning “layer, spread out,” and sphaira, meaning “ball, sphere.” The term was coined in the early 20th century as scientists mapped Earth’s atmosphere into distinct stratified layers. The root strat- = layer appears in many scientific terms (stratum, stratigraphy). The suffix -sphere denotes a rounded region or zone. The word first appeared in English in the 1920s during the era of rapid atmospheric research following early balloon flights and the discovery of the ozone layer, when precise descriptions of the atmosphere’s vertical structure became essential for aviation and meteorology.
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💡 These words have similar meanings to "Stratosphere" and can often be used interchangeably.
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Words that rhyme with "Stratosphere"
-tre sounds
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