WordWeb Online

1. Full of difficulty, confusion or bewilderment
   "perplexed language"; "perplexed state of the world"

1. Be confusing or perplexing to; cause to be unable to think clearly
   "These questions perplex even the experts";
   - confuse, throw, fox, befuddle, fuddle, bedevil, confound, discombobulate, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, dumbfound
    
2. Make more complicated
   "There was a new development that perplexed the matter";
   - complicate

See also: at a loss, at sea, baffled, befuddled, bemused, bewildered, confounded, confused, lost, mazed, metagrabolised, metagrabolized, metagrobolised, metagrobolized, mixed-up, mystified, nonplused, nonplussed, puzzled, questioning, quizzical, stuck

Type of: alter, be, change, modify

Antonym: unperplexed