IPA: /kəmˈpleɪsəntli/
KK: /kəmˈpleɪsəntli/
In a way that shows a willingness to please others or be agreeable.
She complaisantly agreed to help her friend with the project.
Complaisantly → It is formed from "complaisant" (from French *complaisant*, meaning willing to please) and the suffix "-ly" (meaning in a manner of). The word "complaisantly" means in a manner that is willing to please or accommodating.
Think of someone who is 'willing to please' ('complaisant') and doing so 'in a manner' ('-ly'). This helps you remember that complaisantly means acting in a pleasing or accommodating way.