συγνώμη / sig-NO-mee / excuse me
I learned this one out of necessity. Greek pedestrians have two nasty habits: One, if you are walking towards them head-on, they will move to their left to try and walk around you, so when you move to your right, you end up bumping into them. Two, if there is a choice between a wide open space on one side of you and the tiniest gap between you and a wall on the other side, they will prefer to squeeze awkwardly through that gap. (Greeks love a good gap.) Signomi is the “excuse me for bumping into you” kind of excuse me.
It also works if you want to get someone’s attention, like the waiter at the taverna.
Also I had to check the spelling on that five times. I gotta do a block about Η vs Ε and Υ vs Ι and Ο vs Ω because I am not sure if there are differences / what situations those differences arise in!