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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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Arrow – For this word:  the “A” is a Long “A” / Short “I” Diphthong (this is due to the placement of the letter “r” directly after it);  the “o” is long;  the “rr” combination is pronounced simply like the single letter “r” (this is the standard pronunciation of this letter combination in The Common Tongue);  and the “ow” combination is pronounced simply like the single long letter “o” (the letter “w” does not affect the pronunciation of the letter “o”).

– /AYR-oh/ – /ˈeɪɹ.o/ – Notice also that the stress is on the first syllable –

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Learn More About The Word “Arrow” On Wiktionary

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