What is "Achartem"?
Rashi: You clouded.
What is the meaning of "Shimru Min ha'Cherem"?
Radak: Guard [Malbim
Malbim: This is why it says "Shimru", and not 'Hishamru ' If you do not [and people take], there will be harm to Yisrael
What is the meaning of "Tacharimu"?
Radak: It is to take from the Cherem (spoils).