4 syllables: Sus, tain, a, ble. Stress on tain.
suh-STAY-nuh-buhl
/səˈsteɪnəbəl/
Sustainable is pronounced suh-STAY-nuh-buhl (/səˈsteɪnəbəl/). It has four syllables (Sus-tain-a-ble), with the stress on "tain". Sustainable is an adjective describing methods or practices that can be maintained over the long term without depleting resources or causing unacceptable environmental harm. It also refers to systems designed to endure or continue functioning effectively, especially in relation to ecological balance. The term is frequently used in environmental, economic, and corporate contexts to denote viability and responsible stewardship.
adjectiveSustainable is an adjective describing methods or practices that can be maintained over the long term without depleting resources or causing unacceptable environmental harm. It also refers to systems designed to endure or continue functioning effectively, especially in relation to ecological balance. The term is frequently used in environmental, economic, and corporate contexts to denote viability and responsible stewardship.
"The company has adopted sustainable farming practices to protect soil health."
"We are seeking sustainable energy solutions to reduce our carbon footprint."
"Her approach to design emphasizes sustainable materials and long-term durability."
Pronounce it as sə-ˈstā-nə-bəl in US English (and same in UK/AU). Break it into syllables: sus-ta-in-a-ble, but typically reduced to sə-ˈteɪn-ə-bəl with primary stress on the second syllable: su-STAIN-a-ble. Start with a soft schwa, move to the long A in STAIN, then a schwa or weak second syllable, ending with -ble. IPA: US/UK/AU /səˈsteɪnəbl/. Mouth posture: lips relaxed for /s/, high front vowel /eɪ/ in /steɪ/, tongue high for /eɪ/, final /bl/ close to a light b-l combination.
Common errors: 1) Dropping the second syllable or misplacing stress as /ˈsjuːstəˌneɪbəl/ — fix by stressing the /steɪ/ syllable: sə-ˈsteɪ-nə-bəl. 2) Slurring the /steɪ/ into /stə-ɪ/ or mispronouncing as /-tain-ə-/; ensure the /eɪ/ is a clear diphthong. 3) Final -ble confusion, pronouncing /bl/ as /bə/ or /bəl/; keep a light, brief /l/ after /b/. Practice with IPA: /səˈsteɪnəbl/; emphasize /ˈsteɪ/.
Across US/UK/AU, the core /səˈsteɪnəbl/ remains, but rhoticity affects r-sounds after vowels in some phrases; in careful speech you’ll hear /səˈsteɪnəbl/ in all three. US tends to bulge the /ɪ/ in the unstressed syllable slightly and maintain a rhotic /r/ only in connected speech; UK and AU often have crisper /ˈsteɪ/ and a shorter /ə/ in the second syllable. Vowel quality and connected speech rhythms vary, but the nucleus /eɪ/ in /steɪ/ remains the same; the final /l/ can be more pronounced in some Australian accents.
The difficulty lies in the multi-syllable structure and the central /eɪ/ vowel in /steɪ/ combined with a late primary stress; many learners misplace the stress or fuse /steɪ/ with preceding /sə/. The sequence sus- STEI -nə -ble requires precise timing: a clear /ə/ before the prominent /ˈsteɪ/ and a light, final /l/. Mastering the final cluster /-nəbl/ and maintaining a steady rhythm helps prevent overemphasis on earlier syllables.
There are no silent letters in sustainable; all letters contribute to the /səˈsteɪnəbl/ pronunciation. The subtlety lies in the second syllable’s long diphthong /eɪ/ and the quick, light /nə/ followed by the consonant cluster /bl/. In careful speech, the /ˈsteɪ/ should be crisp, with /eɪ/ as a distinct diphthong rather than a schwa, and the final /l/ should be light and not swallowed.
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Sustainable originates from the adjective sustainable, which in turn derives from the verb sustain, meaning to support, uphold, or endure. Sustain comes from Old French sostenir, from Latin sustentare (sine, “without” + tenere, “to hold”). The sense of maintaining, supporting, or preserving dates back to Middle English. The -able suffix denotes capability, giving the sense of something able to be maintained or upheld. The term gained prominence in English environmental discourse during the late 20th century, aligning with broader concerns about renewable resources, ecology, and long-term viability. Over time, sustainable has broadened from a strictly environmental meaning to include social, economic, and organizational contexts (sustainable development, sustainable business), emphasizing continuity, balance, and responsible stewardship. First known uses in scholarly and policy texts trace to discussions of sustainable agriculture and resource management, with academic employment rising in the 1980s and 1990s as sustainability became a global framework for policy, industry, and everyday life.
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Words that rhyme with "Sustainable"
-ble sounds
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