to them; before them; up to themThe meaning depends on context. With verbs of understanding, it means “to them” or “through to them,” as in До них не доходит (“They don’t get it”). With movement or access, it can mean “to them” or “up to them,” as in Ты до них доберешься (“You’ll reach them”). With a time or sequence reference, до них means “before them.”
RU: Я пытался объяснить им правило, но до них так и не дошло.
EN: I tried to explain the rule to them, but they still didn’t get it.