4 syllables: tra, ject, o, ries. Stress on ject.
/trəˈdʒɛk.tər.iz/
trajectories is pronounced /trəˈdʒɛk.tər.iz/. It has four syllables (tra-ject-o-ries), with the stress on "ject". Trajectories refers to the plural of trajectory: the curved path that an object follows as it moves through space or time. In science and mathematics, trajectories describe the course determined by forces acting on a body; in everyday use, they describe the likely courses of events or plans over a period. The term often implies a plotted, dynamic route rather than a straight line.
Say it backTrajectories refers to the plural of trajectory: the curved path that an object follows as it moves through space or time. In science and mathematics, trajectories describe the course determined by forces acting on a body; in everyday use, they describe the likely courses of events or plans over a period. The term often implies a plotted, dynamic route rather than a straight line.
"The astronauts plotted their trajectories to re-enter Earth's atmosphere safely."
"Researchers analyzed the trajectories of storm systems to predict their paths."
"The company mapped the trajectories of user growth over the next five years."
Start with /trə-/ where /ə/ is a reduced vowel (schwa). The second syllable is /ˈdʒek/ with the voiced palato-alveolar affricate /dʒ/ followed by /ek/; the stress is on this syllable: tra-ˈdʒek-. The third syllable is /tə/ (schwa) and the final is /rɪz/ or /riːz/ depending on accent. In US and UK, end with /-iz/ or /-iːz/. Overall: trə-ˈdʒek-tə-riz. For careful speech, ensure the /dʒ/ is released clearly and the final /z/ is voiced, not a sibilant fricative blend.”,
Two common errors: (1) flattening the /dʒ/ into a simple /t/ or /j/ sound, losing the voice lead of /dʒ/. Correct by placing your tongue at the alveolar ridge with the blade close to the palate and releasing with a brief frictiony affricate. (2) misplacing stress, saying tra-ˈjecto-ry or tra-jecto-ries. Keep the primary stress on the second syllable: tra-ˈdʒek-tə-ries, and practice a clean /-t/ before /ə/ rather than a glide. Also avoid blending /r/ too early so the final /rɪz/ stays distinct.”,
US: rhotic, pronounce final /r/; /ˈtraɪ.dʒɛk.tɔː.riːz/? In practice: /trə-ˈdʒek-tə- rɪz/. UK: non-rhotic, final /r/ often silent: /trə-ˈdʒek-tə-ɹiːz/ with lengthened vowels. AU: generally rhotic but with Australian vowel quality: /trə-ˈdʒek-tə-ɹiz/ with slight widening of the diphthongs and less rhoticity than US. Internal /dʒ/ remains a single affricate, and the second syllable bears strong stress across all varieties; the vowels in the second and penultimate syllables may shift slightly (closer to /eɪ/ or /eɪ/ depending on speaker).”,
Because it combines a voiceless/voiced affricate cluster (/dʒ/ after /t/) with multiple syllables and a stressed second syllable. The sequence /trə-ˈdʒek/ requires precise tongue elevation for the palato-alveolar /dʒ/, plus a clear release into /t/ before a reduced vowel. The final /riːz/ or /riz/ can blur with a voice-onset-time difference if the /r/ is reduced in non-rhotic speech. Mastery hinges on sustaining the /dʒ/ smoothly and avoiding vowel reduction that muddies the syllables.”,
Yes. The plural ending is typically /-ɪz/ or /-iːz/ depending on accent and preceding consonant voicing; here it’s /-ɪz/ after /t/ and /ə/ in careful speech. You should pronounce a clear, voiced /z/ at the end in most varieties, which helps distinguish it from non-final consonant runs. In fast speech, some speakers may reduce the final to /-z/ or /-iz/, but careful articulation keeps the /ɪz/ or /iːz/ distinction.”}],
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US: rhotic, longer /ɪ/ in final syllable, clear /r/. UK: non-rhotic, /r/ often non-pronounced; vowels may be shorter and more clipped. AU: rhotic but with broader vowel qualities; syllables can be more rounded and less centralized. Use IPA cues: /trə-ˈdʒek-tə-riz/ (US), /trə-ˈdʒek-tə-ɹiːz/ (UK), /trə-ˈdʒek-tə-ɹiːz/ (AU). Focus on the /dʒ/ and the final /ɹ/ vs /ɪz/ endings. Also watch vowel height in the second syllable: avoid /e/ or /æ/ in that slot; aim for a clear /eɪ/ or /e/ depending on dialect.
Trajectories comes from the Latin trajectoria, from tra- ‘across’ + iac- ‘to lie, be placed’ + -oria, a suffix denoting a place for a thing, with influence from French trajectoire and Italian traiettoria. In physics and mathematics, trajectory (singular) appeared by the late 19th century to describe the path of a moving point under forces. The plural trajectories emerged as the concept generalized to multiple possible paths or evolutions. The word’s sense broadened through 20th-century science, becoming common in meteorology, astronomy, engineering, and social science to discuss the evolution of a system’s position or state over time. First known English uses appear in late 19th to early 20th century scientific writings, aligning with terms like “trajectory line” and “linear trajectory” that described the locus of a moving object. The prefix tra- (across) combined with iac- (to lie) evokes a sense of movement across space, with -tories aligning with other pluralized science terms from Latin-rooted -oria. Today, trajectories conveys both literal physical paths and abstract developmental courses, including statistical trajectories in data modeling and narrative trajectories in storytelling. In everyday language, it often appears in analyses of trends, outcomes, and future planning."
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