soundly russian

• здо́рово

  great, magnificently, splendidly, superbly, healthily, soundly, wholesomely, fine

• добротно

  well-made, soundly, durably, thoroughly

• здра́во

  reasonably, soundly, sensibly

• отду́ть

  thrash soundly

• дры́хнувший

  who had slept soundly, having slept deeply, who was fast asleep

• дры́хнущий

  soundly sleeping, fast asleep, snoring

Examples

• Ребёнок крепко спал у ма́мы на рука́х.The baby was sleeping soundly in his mother's arms.
• Ребёнок беспробудно спал на рука́х матери.The baby was sleeping soundly in his mother's arms.