I am glad we agree about the
sound /w/.
That leaves us with the
letter <w>.
Letters of the alphabet must not be confused with sounds. By convention and for convenience, letters that represent vowel sounds are called vowels and letters that represent consonant sounds are called consonants. (In the rest of this post when I use the word "vowel" I mean a vowel symbol or letter and use "vowel sound" to refer to sounds.) This does not present any special problem for many languages, but for some, including English, difficulties arise when you begin to look into it. The complexities of English orthography arise, at least in part, because the way it is written is etymological rather than phonetic; that is, writing represents an earlier stage of the language.
Consider the words
mat and
mate. If asked, most people would have no hesitation in saying that <m> and <t> were consonants and <a> and <e> were vowels. A moment's thought, however, may lead us to ask what the <e> is doing in
mate. It clearly has a function in that it changes the vowel sound between the <m> and <t> -
mat and
mate are pronounced differently. Even so, the <e> has no value on its own - you have to take the whole package of <a> + <C> + <e> = the vowel sound in
mate, a fairly regular correspondence.
Consonants also influence the value given to vowels.
Take
mating v
matting. Here it is
the doubling that changes the quality of the vowel sound. Are we justified in saying that there is some indication of "vowelness" in the consonants here?
The vowel sound of
bath can be represented in several ways:
bath
harm
palm
etc
The <r> and <l> are not pronounced, but without them we have ham and Pam. Can <r> and <l> be said to be functioning as consonants?
Now consider the letter <k>. It is a consonant most will say. By what is it doing in
knot? The <k> does help to show the pronunciation since
not is pronounced in the same way. It is true that the presence of the <k> helps to distinguish the two words, but that is coincidental; it is simply the case that the <k> has not been eliminated since the /k/ stopped being pronounced. Are we justified in saying that in
knot <k> is a consonant?
I have already noted above that <y> can function to represent (a) the sound /j/ (b) a vowel or dipthong and (c) an element of a dipthong.
<w> does not operate in quite the same way as <y> as (ignoring the rare borrowing from Welsh) it never operates
on its own to represent a vowel or dipthong. It can :
(a) represent the sound /w/ in way
(b) combine with another vowel to represent a vowel sound as is
law
(c) combine with another vowel to represent a dipthong as is
cow
I therefore do not see the problem in saying that <w> has a dual function in writing - it is both a vowel and a consonant.