The term 'Smoothly Agreeable' can be summed up by the word 'SUAVE', which is defined as having or showing sophisticated charm, poise, and assurance. It is often used to describe someone who is able to handle difficult situations with grace and tact. SUAVE people are often seen as being diplomatic and able to negotiate difficult conversations without becoming confrontational. They are also known for their ability to remain calm and composed in any situation.