didn't tell youA literal combination of не сказать (“not to say/tell”) with тебе (“to you”). The form changes according to the subject and tense: не скажешь means “you won’t say,” не сказали means “they didn’t tell,” and по тебе не скажешь means “you wouldn’t know it from looking at you.”
RU: Он тебе не сказал, что встреча отменена?
EN: Didn't he tell you that the meeting was canceled?