Matching Pairs Vocabulary sleeping habitsOnline version Match the expression with the correct definition by Pedro Torres Hernandez 1 drift off 2 be wide awake 3 nod off 4 feel drowsy 5 sleep like a log 6 to take a power nap 7 be sound sleep 8 toss and turn 9 be fast asleep Someone who is fully awake and unable to sleep sleeping in a way that makes it difficult to wake you sleeping deeply you gradually fall asleep fall asleep unintentionally. to move about and turn over in bed because one is unable to sleep tossing and turning all night to sleep very soundly , so well that noises don't even wake you up. sleepy and having low energy 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