One syllable: fills.
/ˈfɪlz/
Say it backFills is the third-person singular present tense of fill, meaning to occupy or charge something with a substance or to complete a space or cup. In everyday use, it often describes making something complete (e.g., fills a glass) or taking up space (e.g., the room fills quickly). The word is concise, common, and phonologically straightforward, typically realized with a short, closed syllable.
"The glass fills slowly as the waiter pours the water."
"She fills the cup and hands it to him."
"The room fills with laughter as the joke lands."
Pronounce as /fɪlz/. Start with a short, lax /ɪ/ as in kit, then move to a voiced alveolar /l/ followed by a crisp /z/. The stress is on the word’s sole syllable, so keep it level and quick. In careful speech you’ll hear a brief schwa less often; in fast speech the vowel may feel slightly reduced, but the integrity of /ɪ/ plus /lz/ should remain. IPA guide: /fɪlz/.
Common errors: (1) Replacing /ɪ/ with a more open vowel like /æ/ in some dialects, (2) Deleting the /l/ or turning /lz/ into /z/ too soon, (3) Voicing the /l/ too softly. Correction tips: keep the /l/ with a distinct tongue tip contact at the alveolar ridge, ensure the /ɪ/ is a short, tense vowel, and produce a clear, voiced /z/ through gentle front-of-mouth tension and a final near-sibilant release. Practice chunking: fɪ + l̩ + z, then blend to fɪlz.
In US and AU accents, /fɪlz/ keeps a rhotic-friendly vowel but not a rhotic influence on the /ɪ/. The UK pronunciation remains /fɪlz/ with a very clear /l/ and a slightly crisper final /z/. In some UK regional accents, you may notice a lighter /l/ or a more dental /z/; in AU, the vowel may be a touch tenser depending on speaker, but the general pattern remains f + ɪ + l + z. Overall, all three are non-rhotic in terms of /r/ not influencing the vowel, but /ɪ/ quality and /l/ lighting can vary slightly.
The difficulty hinges on transitioning quickly from the lax /ɪ/ vowel to the alveolar /l/ and rapidly releasing into the /z/. Cohesion of the /l/ and the final voiced /z/ requires precise tongue-tip contact and smooth voicing without an audible stop. Speakers often shorten the vowel or merge /l/ with /z/. Focus on maintaining a short, crisp /ɪ/ and a strong, continuous /l/ plus /z/ sequence, even when speaking quickly.
No silent letters exist in fills. The word is a simple one-syllable verb form with primary stress on the single syllable. The phonetic flow is f + ɪ + l + z. There’s no stress shift within this word; the entirety is pronounced in one beat. The challenge is sustaining precise articulation of the /l/ and the final voiced /z/ in connected speech.
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Fills comes from the verb fill, from Old English felan, fyllan meaning to make full, laden, or to occupy. The root is Proto-Germanic fillan, with related descendants in Dutch vullen and German füllen. The sense of causing something to become full is ancient, appearing in early Germanic texts. Over time, fill expanded to metaphorical senses (to fulfill obligations, to occupy space, to load a vessel). The 14th–15th centuries show the noun forms referencing contents, while the present-tense third-person singular form fills emerged through regular English inflection patterns. The word’s core semantic core—to make something complete by adding substance or mass—remains stable, with modern usage spanning physical filling, data fields, and abstract fulfillment.
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💡 These words have similar meanings to "fills" and can often be used interchangeably.
🔄 These words have opposite meanings to "fills" and show contrast in usage.
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Words that rhyme with "fills"
-lls sounds
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