ree-AK-shuhn
/ɹiˈækʃən/
reaction is pronounced ree-AK-shuhn (/ɹiˈækʃən/). Reaction refers to an automatic or involuntary response to a stimulus or event, often accompanying emotional or cognitive processing. It can also denote a chemical process that occurs as a result of a cause. The term encompasses both physiological and psychological responses, and in chemistry, it describes a transformation where reactants become products. The word is commonly used in science, psychology, and everyday conversation to describe responses or outcomes.
Reaction refers to an automatic or involuntary response to a stimulus or event, often accompanying emotional or cognitive processing. It can also denote a chemical process that occurs as a result of a cause. The term encompasses both physiological and psychological responses, and in chemistry, it describes a transformation where reactants become products. The word is commonly used in science, psychology, and everyday conversation to describe responses or outcomes.
"Her immediate reaction to the news was to call her family."
"The chemical reaction released heat and changed color."
"Public reaction to the policy was mixed and nuanced."
Pronounce as /riˈækʃən/ (US/UK/AU share the same core). Break it into three syllables: /ri/ as in reel, /ˈæk/ with a strong short a, and /ʃən/ like 'shun.' Primary stress on the second syllable: ri-ACK-shun. In connected speech, the initial /r/ blends smoothly from before, and the /t/ can be softened in rapid speech to /ʃ/ context, though typically kept as /t/ before -ion. Audio references: Cambridge/Forvo pronounciations align with this rhythm.
Two common errors: (1) Misplacing emphasis, saying re-AC-tion with the stress on the first syllable; (2) Slurring the /t/ into /ʃ/ or dropping the /t/ altogether, saying ri-æk-ən. Correction: keep the main stress on /ˈæk/ and clearly pronounce /t/ before the -ion, producing /ækʃən/. Practice careful syllabic separation then blend: /ri/ + /ˈæk/ + /ʃən/. Use a slow tempo first, then accelerate, ensuring the /æ/ stays fronted and the /ʃ/ is a clear postalveolar consonant.
All three accents share /riˈækʃən/, but rhoticity affects the initial /r/ quality slightly: US and AU are rhotic with a more post-vocalic r realization and a fuller /ɹ/; UK is typically non-rhotic, so /r/ is less pronounced when not followed by a vowel. The /æ/ vowel quality is similar, but Australian accent may be closer to General American in vowel height and duration. The main dynamic difference lies in the vowel length and the T realization: US often keeps a crisp /t/; UK may have a glottalization tendency in rapid speech.
Key difficulties: cluster transition from /æk/ to /tʃ/ due to adjacent alveolar stop /t/ and postalveolar /ʃ/. Many learners insert extra vowels or coalesce sounds, resulting in /riːæktjən/ or /riˈæktɪən/. Focus on keeping a clean /t/ before /ʃən/, with the mouth relaxing from /æ/ to /ʃ/. Primary challenge: balancing the alveolar stop with a following palato-alveolar fricative, ensuring the /æ/ remains distinct and the /t/ remains precise.
A unique aspect is the /ˈæk/ nucleus followed by /ʃən/, requiring a bridging transition from a front vowel to a postalveolar fricative with a gentle onset to /ʃ/; beginners often mispronounce as /riˈækɪən/ or /riˈækjən/. The recommended focus is the /æ/ to /ʃ/ glide, keeping the /t/ audible as /t/ before /ion/ in careful speech. The phonetic core is three distinct phonemes: /ri/ - /ˈæk/ - /ʃən/.
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Reaction comes from the late Latin reactionem, which means ‘a setting back’ or ‘a resisting,’ derived from the verb reagere ‘to respond, react’ (re- ‘back’ + agere ‘to drive, do’). The Latin term evolved through Old French reaction and Middle English adoption, aligning with scientific and philosophical uses in the 17th century. Early senses centered on physical response to stimuli, then broadened to psychological responses and, in chemistry, to the sequence of events where reactants transform into products. The modern sense of reaction as a response to stimuli and as a chemical process appeared in the 18th–19th centuries, reflecting both common parlance and scientific jargon. First known use in English appears in the 16th–17th centuries in philosophical discourse, while the chemical sense solidified with the growth of modern chemistry in the 19th century as experiments and equations required precise terminology for cause-and-effect relationships.
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Words that rhyme with "reaction"
-ion sounds
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