1)
What is the meaning of "la'Azasim Leimor"?
1.
Rashi, Targum Yonasan: It was said to the people of Azah.
2.
Malbim: Shimshon himself commanded to tell them that Shimshon is in the city, just he did not tell them that he is Shimshon.
2)
Why does it say "va'Yasobu"?
1.
Malbim: They did not recognize [Shimon], who told them. They went around investigating asking about Shimshon, to seize him when he wants to leave.
3)
What is the meaning of "va'Yischarshu"?
1.
Rashi: They were silent. Radak - they made themselves like Chereshim (deaf-mutes), so Shimshon would not guard himself from them.