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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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(Applying Makeup Can Sometimes Accentuate A Woman’s Natural Beauty)

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Accentuate – For this word:  the first “A” turns into an i-schwa;  for the “cc” combination — the first “c” is hard, and the second “c” is soft (this is one of TWO standard pronunciations of this letter combination in The Common Tongue);  then the first “e” is short;  the first “t” is pronounced like the “ch” combination (this is due to the placement of the letter “u” directly after it);  the “u” is long;  there is a phantom-w in-between the “u” and the “a” (this is a product of the transition from the “u” to the “a” vowel sound);  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).

– /ihk-SEHN-choo-ay[t]/ – /ə(ɪ)k.ˈsɛn.tʃu.we[t]/ – Notice also that the stress is on the second syllable –

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See Also:  Accent & Accentuated

Learn More About The Word, “Accent” In The Common Tongue

Learn More About The Word “Accentuate” On Wiktionary

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