ĵ like z in azure, s in visual.
r is slightly trilled or rolled.
s like s in see, basis.
ŝ like sh in shine, rash, ch in machine.
ŭ like w or consonantal u. See Diphthongs, 5.
NAMES OF THE LETTERS.
4. The vowels are named by their sounds, as given in 2. The names of the consonants are bo, co, ĉo, do, fo, go, ĝo, ho, ĥo, jo, ĵo, ko, lo, mo, no, po, ro, so, ŝo, to, ŭo, vo, zo. These are used in speaking of the letters, in pronouncing them in abbreviations, as ko to po for k. t. p. (= etc.), and in spelling words, as bo, i, ro, do, o, birdo.
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 naïve, etc.), they are written with j and ŭ instead. Their pronunciation is as follows:
aj like ai in aisle.