Sentence:  Character Data tags allow you to place complex strings as the text of an element&mdash;without the need to manually <WSD>escape</WSD> the string. 
Meaning of the word marked with <WSD> tags:  To cause (a single character, or all such characters in a string) to be interpreted literally, instead of with any special meaning it would usually have in the same context, often by prefixing with another character.