Weekly Vocabulary Words

Gavin has vocabulary words each week as part of his homework.  He has to read the word, and then use it in a sentence.  On the first day of each week, we define each of the words.  Thereafter he has to remember the word and use it in a sentence.  One of the words this week is relief.  I asked him if he knew what that word meant.  He said "Yes.  When the car didn't hit me I thought; Hey!  That's a relief!"