What are consonants? The question is asking for the consonant in the middle and in the end of words?
Very simply, consonants are all of the non-vowels of the alphabet, namely, the letters b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, z. The letter "y" can also be used as both a consonant and a vowel.
The literary term consonance is the repetition or recurrence of consonant sounds especially at the end of stressed syllables but without identical vowel sounds. It can also appear as a near rhyme. (Example: "plaintiff" and "caliph." Both words end with an "f" sound.)
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