7 Heb “a man to his brother.”
8 The verb is נָתַן (natan, “to give”), but this verb has quite a wide range of meanings in the Bible. Here it must mean “to make,” “to choose,” “to designate” or the like.
9 The word “head” (רֹאשׁ, ro’sh) probably refers to a tribal chief who was capable to judge and to lead to war (see J. R. Bartlett, “The Use of the Word רֹאשׁ as a Title in the Old Testament,” 19 [1969]: 1–10).
10 The form is a cohortative with a vav (ו) prefixed. After the preceding cohortative this could also be interpreted as a purpose or result clause—in order that we may return.

In other versions

And they said to one another, “Let us choose a leader and go back to Egypt.”

And they said to each other, “We should choose a leader and go back to Egypt.”

So they said to one another, “Let’s appoint a leader and go back to Egypt.”

Then they plotted among themselves, “Let’s choose a new leader and go back to Egypt!”

They said to each other, “Let us appoint a leader, and we will return to Egypt.”

And they said one to another, Let us make a captain, and let us return into Egypt.

Public Domain