Pronunciation

How to pronounce “interaction

“interaction” is pronounced /ɪntɚɹækʃən/ — 4 syllables.
The sound

Say “interaction

interaction

/ɪntɚɹækʃən/

Say it right

4 syllables. Stress the 'ac' part (say it longer and louder) and let the others relax — unstressed vowels often soften to a lazy /ə/.
Meaning

a mutual or reciprocal action; interacting

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