Some said: "Uri doesn't rule out that sh'vaqtani could have degenerated into sabachthani".

But there are 2 things which should be noticed here. Sigma is really pronounced Sheekmah in Greek Koine, and one gospel account has an attempted pronounciation by a man in agony. I feel more than a day late here, but I want to expose the myth that Greek has not "sh" or j-like sound. The Zeta letter, pronounced sitha, is used for s sounds (supposedly a 'ts' sound) which happen to be more frequent in english. Sabacthani is really shabagtani -- σαβαχθανι, and the gospel writer confirms that the verb was pronounced correctly while lama and hli were not. Mark reports the pronounciation attempt, while Matthew reports the intended statement.