What is the meaning of "Sagi b'Esh Alohi"?
Rashi: It was very bad in his eyes, for he loved Daniel, and did not want that he will die.
What is the meaning of "Sam Bal Lesheivavuse"?
Rashi: He rejected the matter to save Daniel, and said that he does not believe them. I do not recognize "Bal"; I explained based on context. Ibn Ezra ? Bal is heart in Arabic.
Malbim: The king retracted, and said that the decree did not apply to Daniel, for he prays a fixed Tefilah every day due to his creed. The decree was only for a particular request. Bal is like Bli, Bilti (negation) ? he is not included in the decree.
Why did he try to save him only until sunset?
Rashi: Then was the time for Tefilah, and Daniel prayed, so the king was unable to save him.
What is the meaning of "Mishtadar"?
Ibn Ezra: There is nothing like this. He thought with all his ability to find an excuse [to exempt him].


