Bulgarian 101

Unstressed "а", "ь", "о", "у" tend to be shorter and weaker compared to their stressed counterparts, approaching each other, though without merging completely.

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a ah 
like in father or manifacture

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e eh 
like in pen or attend

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и i 
like in sin or to be

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ий long i 
like in sea or keyboard

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o oh 
like in more or nothing

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у uh 
like in tuna or full

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ъ ə 
like in about or bulk

Semivowels

й y (i-kratko/i-short)
like in yes or play

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Before a vowel (after another vowel or at the beginning of a word) denotes a diphthong like in "crayon" or "yes". After a vowel at the end of the word denotes very short 'i' like in "play" or "fly". Can be used only next to vowels and not before or after a consonant.