2 syllables: Com, post. Stress on Com.
KAHM-pohst
/ˈkɑmpoʊst/
Compost is pronounced KAHM-pohst (/ˈkɑmpoʊst/). It has two syllables (Com-post), with the stress on "Com". Compost (noun) refers to decomposed organic matter used to improve soil, or the material itself produced by natural decay. It denotes a nutrient-rich, crumbly substance formed from kitchen scraps and yard waste through controlled microbial activity. In broader usage, it can describe the act of turning waste into soil amendment. 2-4 sentences total, succinct and precise.
nounCompost (noun) refers to decomposed organic matter used to improve soil, or the material itself produced by natural decay. It denotes a nutrient-rich, crumbly substance formed from kitchen scraps and yard waste through controlled microbial activity. In broader usage, it can describe the act of turning waste into soil amendment. 2-4 sentences total, succinct and precise.
"The gardener added rich compost to the raised beds this spring."
"Compost piles should be kept moist but not soggy for optimal decomposition."
"She started a compost bin in the corner of the yard to reduce waste."
Pronounce as COM-post with two syllables. In US English current form often /ˈkɒmˌpoʊst/ (stress on first syllable, secondary on 'po'), while British/Australian often /ˈkɒmpɒst/ with strong stress on the first syllable and a short, flat 'o' in the second. Start with /k/ followed by /ɒ/ as in 'cot', then /m/; the second syllable begins with /p/ followed by /oʊ/ or /ɒ/ depending on accent, and ends with /st/. Audio reference: you can compare with 'compost' near /ˈkɒmpɒst/ in most dictionaries.
Common mistakes include: misplacing stress (pronouncing it as a one-syllable word 'compost' as in 'completed' or misplacing emphasis on the second syllable), and vowel reduction in the second syllable. Another mistake is saying /ˈkæmpoʊst/ with an 'a' in the first syllable or elongating the second vowel too much. Correct by keeping the first syllable /ˈkɒm/ or /ˈkɒmp/ depending on accent, and keeping the second syllable /poʊst/ or /pɒst/ with short, clipped vowels. Practice with minimal pairs: 'bombed' vs 'boned' style differences.
In US English, you’ll often hear /ˈkɒm.poʊst/ with a clear long 'o' in the second syllable and an American rhotic influence around /ˈkɒm.poʊst/. In UK and AU accents, it's typically /ˈkɒmpɒst/ with a shorter, clipped second vowel and less diphthongization in 'o'. The main differences are the second-syllable vowel quality and the presence or absence of a centering diphthong. Rhoticity affects the /r/ sound—both US and AU are non-rhotic for 'compost', meaning no post-vocalic 'r' in standard pronunciations.
The difficulty lies in balancing two rhyming syllables and the subtle vowel shift between /ɒ/ and /oʊ/ (or /ɒ/ vs /ɒ/). Learners often mispronounce by turning the second syllable into a long /oʊ/ or by misplacing stress, producing /ˈkɒmˌpoʊst/ with overly rounded lips. Also, the cluster /mp/ in 'comp-' can be tricky if you’re not used to a fast, fused sound. Focus on a crisp /m/ and an immediate /p/ into /st/.
The word has two short, tight consonant boundaries: /k/ + /ɒm/ and /p/ + /ɒst/, with the potential for a slight secondary stress or added length on the first syllable depending on accent. The key is crisp syllable separation: 'COM-post' in a stressed, two-syllable rhythm. In careful speech, avoid merging into a single syllable and avoid pronouncing the second syllable with a long vowel. Use IPA references from major dictionaries for precise guidance.
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Compost comes from the Old French compost, from composter meaning to put together, from com- ‘together’ + poster ‘putting’, and is related to the Latin componere ‘to put together, to arrange’. In Middle English, compost described something put together or arranged, and by the 18th–19th centuries it evolved to specifically denote decayed organic matter used to enrich soil. The modern sense of composted material for horticulture emerged as agricultural science highlighted the benefits of decomposed organic matter for soil structure and nutrient availability. First known uses appear in English texts around the 14th century, with definition narrowing over time to the yard-waste to soil-amendment sense by the 19th century as composting became widespread in gardening manuals and agricultural treatises. Today, compost is a common term in horticulture, waste management, and sustainable farming, denoting both the material itself and the process of producing it.
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💡 These words have similar meanings to "Compost" and can often be used interchangeably.
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Words that rhyme with "Compost"
-ost sounds
-ast sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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