- keep smb. in the dark
- или leave smb. in the darkдepжaть кoгo-л. в нeвeдeнии, cкpывaть oт кoгo-л.In any case, I'm certain Audrey Noel never wilfully kept your son in the dark. She's much too proud (J. Galsworthy). Often she evaded my questions, and more than once she concealed a fact that she clearly knew. There were still places where I was left in the dark (C. P. Snow)
Concise English-Russian phrasebook.