From diverse ancient sources, we know that on the cult statue of Artemis at Ephesus, there were six words inscribed in Greek script:
askion kataskion lix tetrax damnameneus aisia
What these six words mean is a matter of considerable speculation, if they mean anything at all. They may simply be barbarous words of invocation, devoid of meaning, although their use is clear. They were a spoken phalactary, a protective spell, an alexipharmika.
Chester McCown suggests that they may be the names of six separate and distinct daimones. I’m not so sure, other than in the sense that a magical word is often treated as a being in its own right by classical magicians. If they are a list of magical beings, then perhaps they represent six daimon servants of Artemis.
If you wish to experiment with the grammata, they are pronounced as follows (at least, approximately — it’s hard to describe another language’s pronunciation without using IPA):
askion (/a/ and /i/ as in Spanish, short o, accent on the first syllable)
kataskion (same as above, accent on second syllable)
lix (short i)
tetrax (short e, accent on final syllable)
damnameneus (short e, eu like a blend between an eh and the French u, accent on last syllable)
aisia (vowels as in Spanish, accent on first syllable)