What is the meaning of the word "Tichru"?
Rashi: It means "You shall purchase" 1 .
What are the connotations of 'Ochel Tishb'ru me'Itam ... "?
Ramban: What the Pasuk means is 'If you want to taste the fruit of Edom or drink their water, then you may only do so if you pay for them in full, at whatever price they ask'. 1
Rashi (on Pasuk 7): Refer to 2:7:2:1.
Ramban: As implied by the word "me'Itam". In fact, Yisrael carried out these instructions, as Pasuk 29 indicates.