What does the La'avof "Al Techalel es Bitcha ... " entail? What is the status of the daughter?
Rashi and Rashbam: It is a La'av against giving one's unmarried daughter 1 to a man to live with without Kidushin.
Ramban #1: It is a La'av against giving one's daughter to a man with whom Kidushin cannot take effect. 2
And what is the meaning of the latter half of the Pasuk?
Rashi: If you do so, the land will 'prostitute' its fruit, to produce it in a different country. 1
Ramban: It is a La'av against a man living with a woman and a woman living with a man, without Kidushin. 2
Targum Yonasan: It means that one should not hold back one's daughters from marrying before they come of age, 3 so that they are not tempted to go after the people of the land and fill it with depravity.