Interesting is pronounced IN-trə-sting (IPA /ˈɪntrəstɪŋ/). Compress to three: 'IN-truh-sting'; stress the first syllable strongly.
IPA: /ˈɪntrəstɪŋ/
Syllables: IN · trə · sting
Common ESL mistake: Learners say four syllables 'in-TER-es-ting' with even stress.
Tip: Compress to three: 'IN-truh-sting'; stress the first syllable strongly.