Sentence:  The reason I said the guard wasn't the toughest shot in curling is because, in my book, that's a shot called the <WSD>"freeze</WSD>". A stone thrown as a <WSD>freeze</WSD> comes perfectly to rest "directly in front" of another stone, without moving it (see Figure 10-5). 
Meaning of the word marked with <WSD> tags:  A precise draw weight shot where a delivered stone comes to a stand-still against a stationary stone, making it nearly impossible to knock out.