divide

noun
A wide divergence between two groups, typically producing tension or hostility. (there was still a profound cultural divide between the parties)

verb
Separate or be separated into parts. (consumer magazines can be divided into a number of different categories)
Disagree or cause to disagree. (the question had divided Frenchmen since the Revolution)
Find how many times (a number) contains another. (36 divided by 2 equals 18)