IPA: /ˈkrɪmɪnəs/
KK: /ˈkrɪmɪnəs/
Relating to or involving crime; illegal or unlawful.
The criminous activities in the area have raised concerns among the residents.
Criminous is formed from "crimen" (meaning crime or accusation) and the suffix "-ous" (meaning full of or characterized by). The word describes someone or something that is full of crime or related to criminal activity.
Think of 'crime' ('crimen') and remember that 'criminous' means full of crime or related to criminal behavior.