Sentence:  I knew, with one of those secret knowledges that can exist between two people, that her suicide was a direct result of my having told her of my own attempt – I had told it with a curt <WSD>meiosis</WSD> that was meant to conceal depths; and she had called my bluff one final time. 
Meaning of the word marked with <WSD> tags:  A figure of speech whereby something is made to seem smaller or less important than it actually is; understatement.