A fricative is a vibration, whereas a trill is flapping of two parts of the organs of speech. English doesn't really have bilabial fricatives. The b and v in Spanish, when used between vowels, are bilabial fricatives, and the v and th in English are labio-dental and lingual-dental fricatives, respectively.Speaking of labials, I always thought the raspberry was a bi-labial fricative.
Raspberries are sometimes called lingo-labial trills, with the exo left out. But that would also describe the sound that a baby makes when it flaps it's lips and makes the bbbbbbbb sound (sorry, I don't really know how to spell that).
Incidentally, the comedian George Carlin called raspberries bilabial fricatives, so you're in good company.
Good point. Still reminded me of labial and ladify.As to pronunciation, I've found only one, and if I read it correctly, labefy is LAB-e-fy. Labial is LABE-i-al. For what it's worth.
