heye-DRAH-luh-suhs
/haɪˈdɹɑləsəs/
Hydrolysis is pronounced heye-DRAH-luh-suhs (/haɪˈdɹɑləsəs/). Hydrolysis is a chemical reaction in which a compound reacts with water to break bonds, often yielding two or more smaller molecules. In biology and chemistry, it is a fundamental process for digestion and metabolism. The term combines Greek roots for water and loosening or breaking, and it’s widely used in contexts from biochemistry to environmental science.
nounHydrolysis is a chemical reaction in which a compound reacts with water to break bonds, often yielding two or more smaller molecules. In biology and chemistry, it is a fundamental process for digestion and metabolism. The term combines Greek roots for water and loosening or breaking, and it’s widely used in contexts from biochemistry to environmental science.
- Misplacing primary stress on the first syllable (ha- vs haɪ-DRɒ...). Ensure the second syllable carries the main weight: haɪ-DRɒ-lə-sɪs. - Overpronouncing the middle vowel: keep /ɒ/ short and avoid turning /l/ into a vowel. - Dropping the final syllables into a clipped /s/; finish with a clean /s/. Practice by saying the word in a rhythm: haɪ-DRɒ-lə-sɪs, then slowly speed up while keeping all segments crisp. - Common error: pronouncing as
How to Pronounce Hydrolysis
"The hydrolysis of sucrose produces glucose and fructose."
"Enzymes catalyze the hydrolysis of proteins into amino acids."
"Thermal hydrolysis can break down organic waste in wastewater treatment."
Phonetic guide: haɪ-DRɒ-lə-sɪs. Primary stress on the second syllable: /ˌhaɪdrɒˈlɪsɪs/ in some notations; more simply, haɪˈdrɒləsɪs with three prominent vowel sounds: /haɪ/ (like hi), /drɒ/ (like droh with a short o), and /lɪ/ or /lə/ before the final /sɪs/. Tip: make the first syllable quick, the second slightly longer, and end with a crisp /ɪs/.
Two common errors are misplacing stress and mispronouncing the middle syllable. People often say haɪˈdrɒlɪsɪs with excessive syllable reduction or confuse the /lɒ/ vowel with /lɒː/. Correct it by exaggerating the second syllable slightly: haɪ-DRɒ-lə-sɪs, keeping the /ɒ/ short and the /ə/ neutral in the third syllable. Practice: softly reduce the final /ɪsɪs/ to /ɪs/ without losing clarity.
US tends to reduce the final vowel more, giving haɪˈdrɒləsɪs with clearer /ɒ/. UK often keeps a slightly tighter /ɒ/ and may use a shorter /ɪ/ in the last syllable: haɪˈdrɒlɪsɪs. Australian pronunciation aligns with UK rhotic tendencies but can show a broader vowel in /ɒ/ and a less pronounced final /ɪs/: haɪˈdrɒləsɪs. The primary stress remains the same in all: second syllable.
The challenge lies in the middle syllable: /drɒl/ or /drɒlə/ with a short, clipped vowel and a light schwa in rapid speech. The sequence -ol- followed by -ysis creates a blend where the /l/ and /ɪ/ can blur. Also, the initial /haɪ/ combines a diphthong with a voiceless onset, and the consonant cluster at the end /sɪs/ can be misarticulated if you don’t finish with a crisp /s/. Practice the clock rhythm: haɪ-DRɒ-lə-sɪs.
Is the second syllable ever pronounced with a strong /drɒˈli/? In careful scientific speech, the preferred is haɪˈdrɒlɪsɪs or haɪˈdrɒləsɪs, with a steady /l/ in the middle and a light /ɪ/ in the penultimate position; there is no silent letter here, and accurate vowel length matters in precise contexts.
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- US: rhotic, /r/ pronounced; short /ɒ/ in second syllable; /ə/ in third. - UK: non-rhotic or weak rhotic in many contexts; /ɒ/ remains open; /ə/ reduced. - AU: rhotic tendencies similar to US; vowel qualities may be broader; final /ɪ/ close to /ɪ/ in stressed syllable. - Focus on distinguishing /ɒ/ vs /ɒː/ and the unstressed schwa in -ly-.
Hydrolysis comes from the Greek elements hydro- meaning water and lysis meaning loosening, destruction, or dissolution. The term appears in scientific Latinized form in early modern chemistry and biology writings to describe water-driven cleavage of chemical bonds. The word follows a long tradition of using -lysis in chemistry (electrolysis, electrophoresis) to indicate a breaking apart, combined with hydro- to specify water as the reactant. First attested in English in scientific works of the 19th century, hydrolysis gained prominence with developments in organic chemistry, enzymology, and biochemistry, where water-dependent cleavage is a central mechanism. Over time, the concept broadened from inorganic hydrolysis routes to enzymatic hydrolysis in digestion and metabolism, and later to industrial processes like hydrolysis-based polymer degradation. Today, hydrolysis is a standard term across chemistry, biochemistry, environmental science, and medicine, with its definition refined to emphasize the role of water as a reactant that cleaves bonds in substrates, often accelerated by catalysts such as acids, bases, or enzymes.
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Words that rhyme with "Hydrolysis"
-ogy sounds
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