The New Student's Reference Work/F

F (ĕf), the sixth letter, is a consonant. It is called a labio-dental surd, because it is made with the lips or, more commonly, with the lower lip against the upper teeth, and does not sound. It requires considerable breath to pronounce it, and gives a simple breath-sound, as in fame. The Spaniards and Greeks had great difficulty in pronouncing it. Its value comes from the Latin.