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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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Alternate [Verb Form] – For this word:  the first “A” is pronounced like the “aw” combination;  the first “e” disappears;  and for the “-ate” suffix – the “a” is a True Long “A”, the “t” is (usually) stopped, and the final “e” is silent (this is one of two standard pronunciations of this suffix in The Common Tongue).

– /AWL-t’r-nay[t]/ – /ˈɔl.tɚ.ne[t]/ – Notice also that the stress is on the first syllable –

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See Also:  Alter, Alternate [Adjective Form], Alternative, Alternatives, & Alternatively

Learn More About The Word “Alternate” On Wiktionary

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