IPA: /kəmˈpleɪsəns/
KK: /kəmˈpleɪsəns/
A willingness to do what others want or to be agreeable and helpful to them.
Her complaisance made her very popular among her friends, as she was always ready to help them.
Complaisance is derived from the French word 'complaisant' (meaning willing to please) which comes from 'com-' (meaning together) and 'plaire' (meaning to please). The term refers to a disposition to please others or a willingness to be agreeable.
Think of someone who is 'willing to please' ('complaisant') and how that reflects a friendly and agreeable nature.