[per.plex] vt [obs. perplex, adj., involved, perplexed, fr. L perplexus, fr. per- thoroughly + plexus involved, fr. pp. of plectere to braid, twine--more at per-, ply] (1593) 1: to make unable to grasp something clearly or to think logically and decisively about something "her attitude ~es me" "a ~ing problem"
2: to make intricate or involved: complicate syn see puzzle