I've always explained the phonemes in squirrel to be the result of the voiced open consonant R having an influence on the vowel sound preceding it. Among other results this makes fir a near rhyme with fur. I can feel my throat articulating more widely open with fur, but the difference between the two in most ordinary or rapid speech is pretty subtle.
__________________
Wanna stop school shootings? End Gun-Free Zones, of course.
|