Definition of perplexing
: difficult to understand : causing confusion
A perplexing feature of insomnia is that people seem to overestimate their sleep loss.— Rita L. Atkinson et al. Chronic acalculous biliary disorders are among the most perplexing diagnostic and therapeutic challenges in medicine.— Richard M. Gore A perplexing problem, often encountered by cat owners, is that of a refusal to use the litterbox after using it for years in the past.— Susan L. Mathews
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Merriam-Webster unabridged
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Time Traveler for perplexing
The first known use of perplexing was in 1585
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