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The pronunciation of any word in English (or any language at all) is not Universal.  This is because there are many different dialects of The English Language — both throughout America, and also world-wide.  The pronunciations that are presented on GiveMeSomeEnglish!!! are based-upon a combination of both “common usage”, and the most neutral accent used in The International Common Tongue — a.k.a. “American English”.
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Affiliation – For this word:  the “A” turns into a u-schwa;  the “ff” combination is pronounced simply like the single letter “f” (this is the standard pronunciation of this letter combination in The Common Tongue);  the first “i” is short;  the second “i” is pronounced like the long letter “e”;  the “a’ is a Long “A” / Long “E” Diphthong;  and for the “-tion” suffix – the “ti” combination is pronounced like the un-voiced “sh” combination;  and the “o” turns into an i-schwa (this is the standard pronunciation of this suffix in The Common Tongue).

– /uh-fih-lee-AY-shihn/ – /ə(ʌ).ˌfɪ.liː.ˈeiː.ʃə(ɪ)n/ – Notice also that there is a minor stress on the second syllable and that the major stress is on the fourth syllable –

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Learn More About The Word “Affiliation” On Wiktionary

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