The "chi" is "X" all right, and is pronounced as a vigorous "h" sound. This is like the "ch" in Loch Ness Monster.
Now my other non-favorite - "psi". I forget that this trident shape is for "psi". And, by the way, now is your chance to wreak your revenge on words in English that are spelled with a silent "p", like psychology. This really is 'puh-sigh', though the "p" is gentle and quick. Pronounce the "p" sound before the "s" sound. Try saying "tips"
Finally, we come to "omega", often used as a word meaning the end. This is an "o" sound, the "big" sibling to "omicron", the little "o". These used to be pronounced differently, but in modern times, they're both just "Oh".
Oh, look, we're done with the letters of the Greek alphabet. I hope this starts you on your way and at least makes the roadsigns a bit more understandable on your travels to Greece.
Now, test yourself on some real Greek roadsigns. And, now you're familiar with them, you can also see the whole Greek alphabet on this page.
You can also practice on some real Greek roadsigns.
And get some more practice on using the Greek alphabet in Greece - compare airfares to Greece here: Find Greek Airfares


