IPA: /kəmˈplɪsɪtəs/
KK: /kəmˈplɪsɪtəs/
Involved with others in wrongdoing or illegal activities, often in a way that suggests agreement or support.
The company was accused of being complicitous in the environmental disaster.
Complicitous → It is formed from "complicit" (from Latin "complicare", meaning to fold together) and the suffix "-ous" (meaning full of). The word "complicitous" describes being full of involvement or complicity in wrongdoing.
Think of being 'folded together' ('complicare') in wrongdoing, which helps you remember that 'complicitous' means being involved in something wrong.