misinform
verb /ˌmɪsɪnˈfɔːm/
  /ˌmɪsɪnˈfɔːrm/
[often passive]Verb Forms
| present simple I / you / we / they misinform |    /ˌmɪsɪnˈfɔːm/   /ˌmɪsɪnˈfɔːrm/  | 
| he / she / it misinforms |    /ˌmɪsɪnˈfɔːmz/   /ˌmɪsɪnˈfɔːrmz/  | 
| past simple misinformed |    /ˌmɪsɪnˈfɔːmd/   /ˌmɪsɪnˈfɔːrmd/  | 
| past participle misinformed |    /ˌmɪsɪnˈfɔːmd/   /ˌmɪsɪnˈfɔːrmd/  | 
| -ing form misinforming |    /ˌmɪsɪnˈfɔːmɪŋ/   /ˌmɪsɪnˈfɔːrmɪŋ/  | 
- to give somebody wrong information about something
- be misinformed (about something) They were deliberately misinformed about their rights.
 - The parents had been misinformed about the incident.
 - a misinformed belief (= based on wrong information)
 
Oxford Collocations Dictionarypreposition- about
 
- be badly misinformed