inform on/against somebody phrasal verb ( see also ↑ inform )
to tell the police or an enemy information about someone that will harm them:
He denied that he had ever informed on his neighbours.
inform on/against somebody phrasal verb ( see also ↑ inform )
to tell the police or an enemy information about someone that will harm them:
He denied that he had ever informed on his neighbours.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012