6 syllables: ra, di, o, the, ra, py. Stress on the.
ray-dee-oh-THER-uh-pee
/ˌreɪdiˌoʊˈθɛrəpi/
radiotherapy is pronounced ray-dee-oh-THER-uh-pee (/ˌreɪdiˌoʊˈθɛrəpi/). It has six syllables (ra-di-o-the-ra-py), with the stress on "the". Radiotherapy is a medical treatment that uses ionizing radiation, typically delivered from outside the body or via implanted sources, to target and destroy cancer cells. It is usually used in conjunction with surgery or chemotherapy and delivered over multiple sessions. The term combines 'radiation' and 'therapy' to denote a therapeutic radiation treatment strategy.
Radiotherapy is a medical treatment that uses ionizing radiation, typically delivered from outside the body or via implanted sources, to target and destroy cancer cells. It is usually used in conjunction with surgery or chemotherapy and delivered over multiple sessions. The term combines 'radiation' and 'therapy' to denote a therapeutic radiation treatment strategy.
- You might lump the first three syllables too quickly, producing something like /ˈreɪdiəθərəpi/; maintain the /əʊ/ and /ɪə/ sequences to keep timing accurate. - Mixing up the TH sound; avoid substituting with /f/ or /t/ and keep the dental fricative /θ/ followed by /ər/. - In fast speech, the final -py can become a quick ‘pee’ or drop the first vowel; ensure a clear /əpi/ ending with a light emphasis on the final syllable.
"The patient underwent radiotherapy after the tumor was surgically resected."
"Advances in radiotherapy allow for precise targeting while sparing healthy tissue."
"Radiotherapy planning involves CT simulation and dose distribution mapping."
Radiotherapy is pronounced as /ˌreɪdiəʊˈθerəpi/ (US: /ˌreɪdiəʊˈθerəpi/; UK: /ˌreɪdɪəʊˈθerəpi/; AU: /ˌɹeɪdɪəʊˈθeɹəpi/). The primary stress falls on the third syllable: ra-di-o-THER-a-py. Start with a clear ‘ray-dee-oh’ for the first three syllables, then place strong emphasis on the ‘THER’ syllable and finish with ‘a-pee.’ Keep the ‘THER’ close to a crisp ‘th’ plus ‘er’ vowel and end with a light schwa slight may occur in fast speech. IPA: US/UK /ˌreɪdiəʊˈθerəpi/.” ,
Common errors include misplacing the stress (trying to stress the first or second syllable), and mispronouncing the ‘th’ as a hard ‘t’ or ‘d’ sound. Another frequent issue is blending ‘di’ and ‘o’ into an unclear ‘dia’ or dropping the ‘oh’ vowel. Correction: practice the three-part onset ‘ray-dee-oh’ with a steady vowel for each, then deliver the ‘THER’ with a clear voiceless dental fricative /θ/ followed by /ər/ (er) and finish with /əpi/ (uh-pee).
In US and UK, the word keeps the root vowels but the ‘ri-’ part can be slightly reduced in rapid speech; the third syllable carries primary stress: /ˌreɪdiəʊˈθerəpi/ (US) vs /ˌreɪdɪəʊˈθerəpi/ (UK). Australian speech tends to be non-rhotic with slightly stronger vowels in the first syllables and a more clipped final -py ending; still the TH sound remains /θ/. Overall, the main variation is vowel quality in the first three syllables and the realization of the rhotic or non-rhotic 'r' depending on region.
Difficulties arise from the multi-syllable structure, the sequence of vowels, and the central /θ/ sound in the stressed syllable. The combination of /ˌreɪdiəʊ/ followed by /ˈθerəpi/ requires precise tongue placement for the dental fricative and careful vowel shaping to avoid collapsing /ə/ into /ɪ/ or /eɪ/. The soft ‘er’ and final unstressed /i/ can blur in rapid speech, so slowing the transition between syllables helps accuracy.
Is there a silent or reduced syllable in rapid speech, such as shrinking ‘oh’ in the middle? While not truly silent, some speakers reduce the /əʊ/ into a shorter, quicker /o/ sound in casual delivery, making it sound like /ˌreɪdəˈθerəpi/. The recommended approach is to maintain full /əʊ/ for clarity in medical contexts and practice the syllable boundaries to avoid slurring.
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- US: emphasize rhotic accent on the /r/ in the middle if pronouncing /ˈθerəpi/ with an American r. UK: typically non-rhotic; your /r/ after /θ/ is not pronounced unless linked to a following vowel. AU: similar to UK but vowels can be broader; keep /θ/ crisp. All: keep /θ/ as a precise dental fricative, avoid rounding the lips too early, and keep jaw relaxed. IPA anchors: /ˌreɪdiəʊˈθerəpi/ (US/UK); AU uses /ˌɹeɪdɪəʊˈθeɹəpi/ with stronger /ɹ/.”,
Radiotherapy derives from the combination of radiation (from Latin radius, meaning ‘ray’ or ‘beam’) and therapy (from Greek therapeia, ‘medical treatment’). The modern scientific sense emerged in the early 20th century with the discovery of X-rays and radioactive isotopes, which enabled the therapeutic use of ionizing radiation. The term radiotherapy gained prominence as clinicians began using radiation to treat malignancies, adapting equipment and dosing to maximize tumor control while minimizing normal tissue injury. First recorded uses of the exact compound in English appear in medical literature around the 1930s–1940s as radiotherapy, often specified as external beam radiotherapy (EBRT) or intracavitary radiotherapy depending on delivery method. Over decades, refinements in fractionation schedules, imaging-guided planning, and combination with systemic therapies shaped radiotherapy into a precise, multidisciplinary modality. Today, radiotherapy denotes a spectrum of approaches, from conventional external beam techniques to advanced modalities like intensity-modulated radiotherapy (IMRT) and stereotactic body radiotherapy (SBRT).
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Words that rhyme with "radiotherapy"
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