Vowel

In phonetic language, a voice is a word in a conversation, like an English ah!  Or oh !, pronounced with an open vocal tract so that there is no build-up of air pressure at any time above the glottis.  This contrasts with the consonant, such as the English word !, there is a contraction or closure at some point along the vocal tract.  A vowel is also understood as a syllable: an equivalent open but non-syllable word is called a semivowel.  In all verbal languages, vowels form formulas or nuclei, but consonants form formulas and codes.  However, some languages ​​allow other words to form the nucleus of a vocabulary, such as syllabic L in the English word table, or r in the Serbian-Croatian VRT "garden."  There is a contradiction between the phonetic definition of "vowel" and the positive definition.  Estimate and illustrate this contradiction: both voices are produced without a contraction, but they apply to English syllable words such as "beginning" and "wet" at the edge of the syllable.