in·form 
/ɪnˈfoɚm/ verb
in·forms; in·formed; in·form·ing /ɪnˈfoɚm/ verb 1 : to give information to (someone) [+ obj] ▪ The book will entertain and inform you. ▪ The arresting officer failed to inform the suspect of his rights. ▪ He failed to inform the suspect that he had the right to remain silent. ▪ We haven't yet been informed of/about her decision. ▪ Frequent reports from the battlefield kept the general informed about how the attack was progressing. ▪ I am sorry to have to inform [=tell] you that your flight has been delayed. [no obj] ▪ The book will both entertain and inform. 2 [+ obj] formal : to be or provide the essential quality of (something) : to be very noticeable in (something)
▪ His Catholic upbringing informs all his writing.
▪ His Catholic upbringing informs all his writing.
inform on also inform against [phrasal verb]
inform on/against (someone) : to give information about the secret or criminal activity of (someone) to the police
▪ Despite pressure from the police he refused to inform on the other conspirators.
▪ Despite pressure from the police he refused to inform on the other conspirators.
