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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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Badly – For this word:  the “a” is short;  the final “d” is pronounced as a flap-d but is (usually) stopped;  and for the “-ly” suffix – the final “y” is pronounced like the long letter “e” (this is the standard pronunciation of this letter combination in The Common Tongue).

– /Bæ[D]-lee/ – /bæ[ɾ].liː/ – Notice also that the stress is on the first syllable –

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Learn More About The Word “Badly” On Wiktionary

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