Sentence:  It's hard enough to separate the geeks from the creeps at your average Anime con (it's more of a Venn Diagram than an either/or, really). The task becomes even more difficult at Arisia, where the sexual undertones are … not particularly <WSD>undertoned</WSD>. 
Meaning of the word marked with <WSD> tags:  To present as less important, noticeable or prominent.