One syllable: Fast.
fast
/fæst/
Fast is pronounced fast (/fæst/). It has one syllable (Fast), with the stress on "Fast". Fast (adverb) means to do something quickly, without delay, or with a high speed. It can also describe departure from a schedule or a firmly held stance or belief. In everyday use, it often contrasts with slow, emphasizing speed, efficiency, or promptness in action or movement.
adverbFast (adverb) means to do something quickly, without delay, or with a high speed. It can also describe departure from a schedule or a firmly held stance or belief. In everyday use, it often contrasts with slow, emphasizing speed, efficiency, or promptness in action or movement.
- You might overly lengthen the vowel (say /feːst/ or /fɑːst/); keep a compact, quick vowel to preserve the speed cue. - You may underemphasize the /t/ or blur the /s/ leading to /fa-st/ or /faq/. Train a crisp alveolar stop with a light burst for a clear /t/ before the /s/. - You could neglect air release, resulting in a muffled ending; emphasize a subtle puff of air after the /t/ to sharpen the /st/ cluster.
How to Pronounce Fast
"I’m running fast to catch the bus before it pulls away."
"The timer is set, so start the bake at a fast, steady pace."
"She spoke fast, making it hard to follow every detail."
US: IPA /fæst/ with a short a as in cat, a plosive /t/ at the end; UK: /fɑːst/ with a long open a and an unaspirated final consonant; AU: /fæst/ similar to US, but with slightly lighter vowel length in some dialects. Start with a quick, clean /f/ labiodental fricative, then /æ/ (US) or /ɑː/ (UK), finishing with /st/ release. Focus on crisp consonants and avoiding vowel elongation before the /st/.
Two common errors: (1) Overextending the vowel, making it sound like /feːst/ or /fɑːst/ for all dialects, which dulls the quickness; keep a short, tense /æ/ (US) or a lax /ɑ:/ (UK/AU) and quick /t/ release. (2) Voicing the /t/ as a stop too softly or omitting it; ensure a clear, audible /t/ with a light burst of air. Practice with minimal pairs like /fæst/ vs /fɑːst/ and emphasize the final /st/ cluster.
US tends to use /fæst/ with a short, lax /a/ and a crisp /st/; UK often uses /fɑːst/ with a broader, tense /ɑː/ and similar final /st/; Australian English sits near US in the vowel quality but can have a slightly closer /æ/ in some speakers. The rhoticity does not change the pronunciation of fast, but vowel length and quality vary; ensure the final /st/ is released crisply in all variants.
The primary challenge is producing the final /st/ cluster cleanly while maintaining a short, precise vowel. For some, the /t/ tensing and release can blur with preceding vowel length, making it sound like /fæst/ with a reduced stop. Additionally, keeping the transition from the vowel to /s/ and then /t/ smooth requires precise tongue positioning and blade–alveolar contact. Focus on a small, sharp /t/ and a quick /st/ release.
No silent letters in the standard pronunciation of the adverb/adjective fast. The stress is on the one-syllable word itself as a monosyllable with primary stress on the single syllable, and the vowel is short. The word is realized with an immediate consonant sequence /f-æ-st/ (US) or /f-ɑː-st/ (UK/AU) and a clear, brief /st/ release.
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- US: /fæst/ with a short front vowel; keep the mouth slightly open and the jaw relaxed, tip the tongue blade toward the alveolar ridge for the /t/ release; /s/ is sibilant with a sharp tail. - UK: /fɑːst/ uses a more open, back vowel; keep the jaw lower, tongue slightly further back, and finish with a precise /st/. - AU: typically /fæst/ like US but with less vowel length; ensure non-rhoticity does not alter the /t/ release. Use the same alveolar placement for /t/ and /s/; focus on keeping the final cluster tight. IPA references: US /fæst/, UK /fɑːst/, AU /fæst/.
The word fast traces back to Old English fastu, related to the Proto-Germanic fadǣ, and is connected to the sense of being firm or fixed rather than moving. In Middle English, fast had wider senses including firmly fixed or secure, which extended to describe a fixed pace or speed. By the 14th century, fast began to denote quickness or rapid movement, as in fast running. The phrase “hold fast” appears in religious and nautical contexts, reinforcing the idea of firmness or speed of action. Over time, fast solidified as an adverb of quickly and as an adjective describing high speed, with usage expanding to idioms like “hold fast,” “fast asleep,” and “fast traffic.” In modern times, “fast” also appears in compound forms (fast-paced, hold fast, fasten) and retains a core sense of distance from slowness, often contrasted with slow. First known print attestations of the adverbial sense appear in Middle English dictionaries, with robust usage by Early Modern English authors, reflecting both literal speed and metaphorical quickness. Overall, fast evolved from a root implying firmness to a broader semantic field around speed, dexterity, and immediacy.
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💡 These words have similar meanings to "Fast" and can often be used interchangeably.
🔄 These words have opposite meanings to "Fast" and show contrast in usage.
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Words that rhyme with "Fast"
-ast sounds
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