Study Spot
Customized learning paths based on interests
In English alphabet, there are five (5) Vowels- a, e, i, o and u. And there are two (2) more letters- y and w, which are called Semi-Vowels. In the word "cry", y is considered as Semi-vowel.
Alphabets which sounds like vowels (phonetically) but functions like consonants are called "Semi-vowels". Eg. A sound that has the quality of one of the high vowels, as (ē) or (o͞o), and that functions as a consonant before or after vowels such as 'y' and 'w' in Yell and Well.
http://www.thefreedictionary.com/semivowelIn phonetics and phonology, a semivowel or glide, also known as a non-syllabic voiced, is a sound that is phonetically similar to a vowel sound but functions as the syllable boundary, rather than as the nucleus of a syllable. Examples of semivowels in English are the consonants y and w, in yes and west, respectively. Written /j w/ in IPA, y and w are near to the vowels ee and oo in seen and moon, written /iː uː/ in IPA. The term glide may alternatively refer to any type of transitional sound, not necessarily a semivowel. For More Information click on the link.
https://en.wikipedia.org/wiki/Semivowel