DIPHTHONGS.

5. Diphthongs are combinations of two vowels uttered as a single
sound, by one breath-impulse. The diphthongs in Esperanto contain an
i or u sound as the second element, but in order to avoid confusion
with combinations of vowels not forming diphthongs (as in "naiva", like
English "naive", etc.), they are written with "j" and "ux" instead.
Their pronunciation is as follows:

"aj" like "ai" in "aisle".

"ej" like "ei" in "vein", "ey" in "they".

"oj" like "oi" in "coin", "oy" in "boy".

"uj" like "ui" in "ruin", "u(e)y" in "gluey".

"eux" like "ayw" in "wayward", or like E(h)oo" pronounced together.

"aux" like "ou" in "out", "ow" in "owl".


COMBINATIONS OF CONSONANTS.

6. Each consonant, in a combination of two or more consonants, is
pronounced with its full value, whether within a word or at its
beginning. There are no silent letters.

a. Thus, both consonants are clearly sounded in the groups "kn", "kv",