1)
What is the meaning of "v'Yis'av ha'Melech Yafyech"?
1.
Rashi: If you do so, the King, Hashem, will desire the beauty of your deeds.
2.
Malbim: The king will embellish your beauty via being your master. That is your primary beauty.
3.
Malbim (Derech ha'Muskal): Your beauty is that he will be your master, and you will heed his counsel and remove your shoes of physicality and its powers.
2)
Why does it say "Ki Hu Adonayich"?
1.
Radak: You have no other Master, even though you are from another nation.
2.
Malbim: Refer to 45:12:1:2
3)
Why does it say "Hishtachavi Lo"?
1.
Malbim: Bow to him (for it is your honor to be his wife).