Synonyms: perplex, complicate
Definition: make more complicated
Usage: There was a new development that complicated the matter
Similar words: alter, change, modify
Definition: cause to change; make different; cause a transformation
Usage: The advent of the automobile may have altered the growth pattern of the city; The discussion has changed my thinking about the issue
Synonyms: dumbfound, bewilder, baffle, beat, amaze, puzzle, pose, mystify, nonplus, perplex, stick, stupefy, flummox, gravel, get, vex
Definition: be a mystery or bewildering to
Usage: This beats me!; Got me--I don't know the answer!; a vexing problem; This question really stuck me
Similar words: throw, bedevil, befuddle, discombobulate, confound, confuse, fox, fuddle
Definition: be confusing or perplexing to; cause to be unable to think clearly
Usage: These questions confuse even the experts; This question completely threw me; This question befuddled even the teacher