therz
/ðɛɹz/
theirs is pronounced therz (/ðɛɹz/). The word theirs is a possessive pronoun used to indicate that something belongs to them. It is often pronounced as a single syllable, with a rhotic initial sound followed by a weak, unstressed vowel in many contexts, and it can function as a possessive determiner or pronoun depending on grammar. In casual speech, the final /z/ or /s/ sound naturally blends with the preceding vowel, producing a smooth, clipped ending.
The word theirs is a possessive pronoun used to indicate that something belongs to them. It is often pronounced as a single syllable, with a rhotic initial sound followed by a weak, unstressed vowel in many contexts, and it can function as a possessive determiner or pronoun depending on grammar. In casual speech, the final /z/ or /s/ sound naturally blends with the preceding vowel, producing a smooth, clipped ending.
"That book is theirs."
"If the bikes are theirs, we should return them to them."
"The decision was theirs to make."
You pronounce theirs as a single stressed syllable with the voiced interdental fricative /ð/ followed by a short lax vowel that reduces to a schwa-like sound before a final /z/ or /s/: /ðerz/. The tongue lightly touches the upper teeth for /ð/, the lips are relaxed, and the vocalic nucleus is very short. The final consonant is voiced /z/ when the following word begins with a vowel or sonorant, but often voiceless in fast speech. Practice by saying 'they' + 'rs' quickly: /ðerz/.
Common errors include pronouncing it as /ðɜːrz/ with an unstressed schwa clearly voiced, or turning it into /ðɛrs/ by over-pronouncing the vowel. Another mistake is devoicing the final /z/ to /s/ in careful speech, which changes meaning in context. Correct by keeping a short, lax nucleus before a voiced final /z/; keep the tongue at the ridge behind the upper teeth for /ð/ and finish with a crisp /z/. Practice with minimal pairs like theirs/there's to feel the contrast.
In US English, you typically hear /ðerz/ with a rhotic, pronounced /ɹ/ quality in some contexts and a clear /z/. UK English often yields /ðeəz/ or /ðeəz/ with a lighter /ə/ and less rhoticity; in some regions, the final is slightly softer or elongated. Australian English tends toward /ðeəz/ with a vowel quality closer to /ə/ or /ɐ/ depending on speaker, and the final /z/ remains voiced. Across all, the initial /ð/ remains a dental fricative; the main variation comes from vowel quality and voicing on the final consonant.
The difficulty lies in maintaining a short, clipped nucleus that naturally links to a voiced /z/; the /ð/ sound is a dental fricative requiring precise tongue placement between the teeth, which many learners substitute with /d/ or /z/. Additionally, the final sibilant should be voiceless only when appropriate; most learners tense the jaw or add extra lip rounding, causing a lengthened or altered sound. Focus on keeping the /ð/ tongue-tip contact and a fast, smooth transition into /z/.
In fluent speech, the /z/ can assimilate or vocalize, causing a voiced amalgam with the next sound, e.g., 'theirs, friends' where the final /z/ slightly links with the initial /f/. The core remains /ðerz/, but phrasing can alter perception of the final sound due to coarticulation and connected speech.
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The word theirs traces back to Old English heritage, where the possessive pronoun forms for third person plural were inflected across cases. The modern form evolved from the Old English demonstrative/pronoun system, combining the determiner possessive suffixed by -es with the root they, a variant of þe and þā indicating possession. Over time, the pronunciation reduced the initial th- cluster followed by a schwa-like vowel, especially in unstressed positions. In Middle English usage, the development of pronoun-possessive clitics led to the contracted, one-syllable form we now hear in most dialects. The first attested spellings in written sources date to the 13th century, with the modern spelling stabilizing in Early Modern English. The evolution mirrors that of other possessive forms (theirs, ours, theirs) as the language shifted from strong inflectional endings toward more analytic and less emphatic markers of possession. This mirrors a broader trend toward rapid reduction of unstressed vowels and final consonants in casual speech, while preserving distinct pronoun identity in formal writing.
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💡 These words have similar meanings to "theirs" and can often be used interchangeably.
🔄 These words have opposite meanings to "theirs" and show contrast in usage.
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Words that rhyme with "theirs"
-ars sounds
Practice with these rhyming pairs to improve your pronunciation consistency:
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