You can click on the Greek word to hear how it is pronounced.
In phonetics where you see:

 ee, oi, ei or i is pronounced as the ee in word beet.
 e, ai as the e in the word bet.
 a as the a in the word father.
 o as the o in the word only.
 ou as the ou in the word Lou.
 x as the x in the word fox.
 th or th like the th in think or th in this.
 y, g, as the y in yes, or w in wad or g in get.
 mp, as the b in big, and nt as d in door.
 gk, gg, as the g in word get.
 tz, as the dg in lodge.
 Two of same consonants together, except γγ, are pronounced like the single consonant. Example: λλ like λ, σσ like σ, μμ like μ, νν like v.