'If anyone would like to offer an american translation of this word, I would appreciate it. I just can't think of a single one word translation. '
The Greeks use 'ambush', or in their own language 'Karteri' which means waiting point or ambush point, probably because ambushes were set to trap marauding pirates in the 1800's. I used to think it was from card playing, since 'kartes' means playing cards ha ha! Like sitting at a card table with a poker face...
To Spaghetti I would pass a tip I got only a month ago concerning Sargos, that really works. Maybe you know this already, but I'm only spearing since April (diving years though), and it was a real revelation, because they are damned smart like you say. If you gently and repeatedly tap the but of your gun on the rock you are hiding behind, as though you are picking at something like shellfish, that is how they feed, so they will be curious to see if you loosen up something they can eat too. I couldn't believe how well this worked on the very first try! In fact, the practice of acting like you are on the bottom busily doing something other than waiting to kill fish, seems to really bring a few varieties closer! Concentrate on the rock (mostly) and not the fish, until they get close and curious as to what you are digging at...