1 puzzle, bewilder, or disconcert (a person, a person's mind, etc.).
2 complicate or confuse (a matter).
3 (as perplexed adj.) archaic entangled, intertwined.
Derivatives:
perplexedly adv. perplexingly adv.
Etymology: back-form. f. perplexed f. obs. perplex (adj.) f. OF perplexe or L perplexus (as PER-, plexus past part. of plectere plait)
Useful english dictionary. 2012.