Sentence:  The productive nature of this novel may lie in the uneasy cohabitation of these various discursive fields and in the variability of their coding – it may <WSD>undercode</WSD> at times and overcode at others. 
Meaning of the word marked with <WSD> tags:  To communicate using codes that do not convey the entire message, but which rely on the recipient's construction of meaning through connotation or subtexts.