5 syllables: hy, dro, gen, a, tion. Stress on a.
heye-drah-juh-NAY-shuhn
/ˌhaɪˌdɹɑdʒəˈneɪʃən/
hydrogenation is pronounced heye-drah-juh-NAY-shuhn (/ˌhaɪˌdɹɑdʒəˈneɪʃən/). It has five syllables (hy-dro-gen-a-tion), with the stress on "a". Hydrogenation is a chemical reaction that adds hydrogen atoms to a substrate, typically saturating carbon–carbon bonds. It is widely used in converting unsaturated fats to saturated fats and in various industrial processes. The term combines hydrogen with the suffix -ation, referring to the action or process of introducing hydrogen.
Hydrogenation is a chemical reaction that adds hydrogen atoms to a substrate, typically saturating carbon–carbon bonds. It is widely used in converting unsaturated fats to saturated fats and in various industrial processes. The term combines hydrogen with the suffix -ation, referring to the action or process of introducing hydrogen.
"The hydrogenation of vegetable oil produces a more stable, solid fat."
"Catalysts like nickel are often employed to promote hydrogenation at moderate temperatures."
"Certain synthetic routes rely on hydrogenation to reduce double bonds in organic compounds."
Pronounce it as /ˌhaɪdrəˈdʒeɪˈteɪʃən/ (US/UK) with primary stress on the third syllable ‘-ja-’ and secondary stress on the initial ‘hy-’ syllable. Start with /ˌhaɪ/ (high) then /drə/ (drə), then /ˈdʒeɪ/ (jay) as a stressed diphthong, followed by /ˈteɪ/ (tay) and finish with /ʃən/ (shən). Ensure the /dʒ/ is a voiced affricate like jam, not a soft d. Audio reference: try hearing the sequence in technical pronunciations on Forvo or YouGlish under “hydrogenation.”
Two frequent errors: (1) misplacing stress, saying ‘hy-drogen-ation’ or stressing the wrong syllable; place primary stress on the third syllable: ha-dru-GEN-ation? instead of haɪ-druh-JAY-teɪ-shən. (2) mispronouncing /dʒeɪ/ as /dʒe/ or '/jeɪ/' as '/eɪ/' leading to ‘hydrogen-atyən’. Correct by briefly lifting the jaw and using a clear /dʒ/ plus the diphthong /eɪ/. Practice with slow, deliberate syllables: hi-druh-JAY-tey-shən.
In US/UK, the main difference is vowel length and rhotics rather than the consonants: US tends to be rhotic with a slightly rhotic /ɹ/; UK often non-rhotic in many accents, but /ɹ/ can appear in linking words. The /haɪdrə/ onset remains similar, while the /ˌdʒeɪˈteɪʃən/ nucleus is stable; Australians often merge vowels slightly and may reduce /ə/ to a weaker schwa in rapid speech. In IPA, you can note US: /ˌhaɪ.drəˈdʒeɪˈteɪ.ʃən/; UK similar; AU: /ˌhaɪ.drəˈdʒeɪˈteɪ.ʃən/ with minor vowel shifts.
The difficulty comes from the sequence of three bisyllabic components with a tense /dʒeɪ/ and the secondary stress on the middle syllable. Also, the combination of /drə/ plus /ˈdʒeɪ/ can create a cluster that many non-native speakers mispronounce as /drəˈdʒɛn/ or misplace the stress. Focus on the proper /ˌhaɪdrə/ onset, then /ˈdʒeɪ/ as the strong peak, and finally /ˈteɪʃən/ with clear /ʃən/. IPA cues included.
A unique feature is coordinating the two vowels in the “-ation” suffix with the preceding /eɪ/ diphthong. The sequence /ˈdʒeɪˈteɪ/ requires you to glide from /eɪ/ to /teɪ/ smoothly without breaking the flow. Keep your lips rounded for the /eɪ/ and relax for the final schwa + n. Emphasize the contrast between /ˈdʒeɪ/ and /ˈteɪ/ to keep rhythm intact.
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The word hydrogenation derives from the combination of hydrogen, the name of the lightest and most abundant element in the universe, with the suffix -ation, indicating a process or action. The term first appeared in scientific contexts in the 19th century as chemists explored reactions that add hydrogen to unsaturated molecules. The root hydrogen comes from Greek hydr-, hydro- meaning water or moisture, and genes meaning born or produced, though in modern chemistry hydrogen is the element with symbol H. The suffix -ation comes from Latin -atio, used to form nouns describing actions. Early formulations in the language of chemistry described the process of “hydrogenating” a substrate, i.e., adding hydrogen to saturate double or triple bonds. Over time, the noun hydrogenation came to denote the specific chemical procedure, its catalysts, conditions, and industrial applications, including fat hydrogenation and hydrogenating alkenes and alkynes. First known uses appear in foundational chemistry texts as researchers named reactions that introduce hydrogen to organic compounds, with the term appearing in journals and textbooks by the late 1800s to early 1900s as synthetic chemistry expanded. The concept became central to petroleum processing, polymer chemistry, and biochemistry, reflecting hydrogen's pivotal role in transforming molecular structures. Today, hydrogenation is a standard term across chemistry, materials science, and chemical engineering, marking a key class of addition reactions.
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Words that rhyme with "hydrogenation"
-ion sounds
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