Possible Clues:

• If you can do this, there's no further argument
• Amicably close a discussion without accord
• A welcome proposal of marriage captures daughter - I don't argue
• Fail to convince each other
• Dodgy gear forfeited in compromise
• Accept that a degree of rift might develop
• Part amicably, having got to the end of the row?
• Not try to convince each other
• Accept a difference of opinion without further argument
• Stop trying to persuade someone that you are right and they are wrong