united and work together as one like the English men
Explanation:
Miantonomo suggests that individual Native American tribes need to be "united and work together as one like the Englishmen," in order to continue to thrive as a people.
The reason is that, Miantonomo believed if the Native American tribes failed to unite as one, it would be easier for the Englishmen to destroy them or starve to death. Because all their environmental resources has been taken over and exploited by the Englishmen.