He studied the complexities of the English language and the perplexities of religious faith.
Deborah Tannen knows all about sisterhood, sister-speak, and the pitfalls and perplexities of sibling rivalry.
The history of exhibiting violence photojournalism is fraught with perplexities.
c.1300, "bewilderment," from Old French perplexite "confusion, perplexity," from Late Latin perplexitatem (nominative perplexitas), from Latin perplexus "confused, involved, interwoven," from per- "completely" + plexus "entangled," past participle of plectere "to twine" (see complex (adj.)). From 1590s as "something that causes perplexity."