2 syllables: fos, ter. Stress on fos.
FAH-stur
/ˈfɑstɚ/
foster is pronounced FAH-stur (/ˈfɑstɚ/). It has two syllables (fos-ter), with the stress on "fos". Foster has several related uses: as a verb meaning to encourage or promote growth, development, or nurturing; and as a noun referring to a family arrangement or environment in which a child is raised. The term conveys ongoing support or cultivation, rather than a one-time action. In contexts like childcare, policy, and relationships, it implies sustained care and development.
Foster has several related uses: as a verb meaning to encourage or promote growth, development, or nurturing; and as a noun referring to a family arrangement or environment in which a child is raised. The term conveys ongoing support or cultivation, rather than a one-time action. In contexts like childcare, policy, and relationships, it implies sustained care and development.
- You may flatten the first vowel or merge the syllables, saying something like /ˈfɒstər/ with an unstressed or reduced second vowel. Remedy: rehearse syllable separation: /ˈfɑː/ + /stər/ and emphasize the /t/ release. - Dropping the final /r/ in rhotic American speech or over-enunciating it in non-rhotic variants. Remedy: practice with a light, controlled /r/ sound, or use a schwa in non-rhotic contexts. - Sloppy consonant transition between /s/ and /t/ causing a rushed /st/ cluster. Remedy: insert a micro-pause or tension-release between /s/ and /t/. Practice with metronome, slow to normal tempo.
"- The charity aims to foster education by supporting underprivileged students."
"- Their goal is to foster innovation within the company through collaborative teams."
"- She fostered a sense of community by organizing monthly neighborhood events."
Pronounce as two syllables with primary stress on the first: /ˈfɑː.stər/ in US, and /ˈfɒ.stə/ in UK/AU. The first vowel is open and back, the second is a schwa in many British variants. Mouth: place the tongue low and back for /f/ followed by /ɒ/ or /ɑː/, then a relaxed /st/ cluster before /ər/ or /ə/. If you have a lighter /ə/ in non-rhotic accents, you’ll hear an optional reduced second syllable in rapid speech. Audio reference: consult pronunciation resources like Forvo for regional variations.
Common errors: (1) Pronouncing as one syllable, merging /fostər/ with /foster/ without clear vowel separation; (2) Dropping the /r/ in non-rhotic accents or over-pronouncing it as a hard /r/. Correction: keep the /ər/ or schwa+r cluster at the end, with clear /t/ before the final vowel. Practicing minimal pairs like foster vs fostered can help your rhythm and final syllable clarity. Break the word into /ˈfɑː/ + /stər/ and practice the transition slowly, then speed up.
US typically uses /ˈfɑː.stər/ with rhotic /r/ in the final syllable. UK/AU tend toward /ˈɒs.tə/ or /ˈɒs.tə/ with a reduced final /ə/; phonetic variants include less pronounced final /r/ in non-rhotic speech. Vowel length and quality differ: US uses a longer low back vowel in the first syllable; UK/AU feature a shorter, more centralized /ɒ/ or /ɔː/ depending on regional dialects. Overall rhythm remains trochaic (strong-weak) across accents, but rhoticity and vowel quality shift the perceived color of the word.
Key challenges include the neat consonant cluster /st/ linking the first and second syllables and achieving the final schwa or /ər/ without adding extra vowels. The suffix cluster can lead to vowel reduction or a stray /r/ in some accents. Tension around moving quickly from /s/ to /t/ without a glottal stop is common. Focus on a clean /t/ release before the final /ə/ or /ər/. IPA guidance: /ˈfɑː.stər/ (US) vs /ˈɒs.tə/ (UK/AU).
The unique pronunciation wrinkle is the subtle vowel of the first syllable and the final rhotic/non-rhotic ending. In careful speech, you’ll hear a distinct /ˈfɒs.tər/ in some UK variants with a stronger /t/ release before the final schwa, while US often yields a more rounded /ˈfɑː.stɚ/ with a more pronounced rhotic ending. Understanding regional vowel shifts and r-coloring helps tailor practice to your target audience.
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- US: rhotic /r/, longer /ɑː/ or /ɑ/ depending on speaker; maintain an audible /ər/ ending. /ˈfɑː.stər/. - UK: non-rhotic tendencies; final /r/ often silent; vowel in first syllable is often /ɒ/ or /ɔː/. Emphasize /ˈɒs.tə/ or /ˈfɒs.tə/ depending on locality. - AU: similar to UK in rhoticity, with Australian vowel color; final /ə/ is compact; aim for /ˈfɒs.tə/ with mild /ə/.
Foster derives from Old French fustorer, from fust (stick or staff) and the notion of nourishing or cherishing by taking care of someone. In Middle English, the term broadened from physical fostering—nursing or supporting a child—to more abstract senses of promoting growth or development. The modern sense of promoting growth, improvement, or development in people, programs, or ideas coalesced over the 16th to 19th centuries, paralleling social changes around child welfare and institutional care. The spelling aligns with f- + -ster, but the pronunciation kept the early stress pattern and final -ster consonant cluster from Old French influence. First known use in English literature appears in later medieval records, but the adaptive extension to policy and organizational contexts emerges in the 18th and 19th centuries as societies formalized caregiving and developmental frameworks, including ‘foster care’ arrangements, which codified shared responsibility for a child’s growth and well-being. The term’s broader use in business and technology as a verb meaning to nurture growth follows general linguistic tendencies to repurpose caregiving metaphors for innovation and development, maintaining the core sense of fostering care and movement toward a goal.
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💡 These words have similar meanings to "foster" and can often be used interchangeably.
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Words that rhyme with "foster"
-ter sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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