WordWeb Online

1. Of an obscure nature
   "rituals totally mystifying to visitors from other lands"
   - cryptic, cryptical, deep, inscrutable, mysterious

1. Be a mystery or bewildering to
   "a mystifying problem"
   - perplex, vex, stick, get, puzzle, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound
    
2. Make mysterious
   "mystify the story"

See also: incomprehensible, inexplicable, mystery, mystification, mystifier

Type of: bedevil, befuddle, blot out, confound, confuse, discombobulate, fox, fuddle, hide, obliterate, obscure, throw, veil

Antonym: demystify