The word 'nark' has several distinct uses: 1: an informer or spy working for the police; 2: a lawman concerned with narcotics violations; 3: cause annoyance in; disturb, especially by minor irritations; 4: inform or spy (for the police)
Informatore is an Italian equivalent of 'nark' in the sense of an 'informer'. It's pronounced 'een-fohr-mah-TOH-ray'. The word in Italian is a masculine gender noun whose definite article is 'il'...