to say 'Yes'

be in unison, assent with another

to settle a dispute (between two opposite sides, opinions etc) by acting as the chosen judge(s)

achieve settlement

to argue

bicker, quarrel

to act to obtain agreement; to produce (something) as a result by doing this

try to bring to an agreement

to discuss in order to come to an agreement; to arrange (something) by discussion

bargain, discuss

to (agree to) pay (a sum of money) regularly (to a cause, for something)

pay for use; contribute