Vision is pronounced VIZH-ən (IPA /ˈvɪʒən/). The 'si' becomes 'zh' — 'VIZH-un' in two beats.
IPA: /ˈvɪʒən/
Syllables: VIZH · ən
Common ESL mistake: Learners pronounce 's' as /s/ or /z/ saying 'VI-zee-un'.
Tip: The 'si' becomes 'zh' — 'VIZH-un' in two beats.