IPA: /ˌæfɪˈʃənəʊ/
KK: /ˌæfɪˈʃɒnəʊ/
A person who is very passionate about and knowledgeable in a particular subject or activity, often showing great enthusiasm and support for it.
He is an aficionado of classical music, attending concerts regularly.
Aficionado → The word originates from Spanish 'aficionado', which means a person who is fond of or enthusiastic about something. The root 'aficionar' means to inspire affection or passion, derived from 'afición' (meaning affection or passion).
Think of someone who is 'fond of' or 'enthusiastic about' something — that's what an aficionado is.
No commonly confused words.