Relier Pairs Vocabulary sleeping habitsVersion en ligne Match the expression with the correct definition par Pedro Torres Hernandez 1 nod off 2 be sound sleep 3 be fast asleep 4 to take a power nap 5 be wide awake 6 drift off 7 toss and turn 8 sleep like a log 9 feel drowsy you gradually fall asleep fall asleep unintentionally. sleeping deeply Someone who is fully awake and unable to sleep sleepy and having low energy to sleep very soundly , so well that noises don't even wake you up. to take a brief sleep during the day in order to improve one's alertness and ability to work efficiently throughout the remainder of the day sleeping in a way that makes it difficult to wake you to move about and turn over in bed because one is unable to sleep tossing and turning all night