perplex
1. [ verb ] be a mystery or bewildering to
Synonyms: puzzle bewilder baffle mystify amaze stick stupify stupefy gravel nonplus beat dumbfound pose trounce flummox vex get
Examples:

"This beats me!" "Got me--I don't know the answer!" "a vexing problem" "This question really stuck me"

Related terms: confuse stagger elude riddle stump solve puzzle_over mystery bewilderment mystification mystification stupefaction puzzle
2. [ verb ] make more complicated
Synonyms: complicate
Examples:

"There was a new development that complicated the matter"

Related terms: simplify change complexify snarl complication complication
Similar spelling:   perplexed
  perplexity
  perplexing
  purple
  Periploca