How to sign: be a mystery or bewildering to
"This beats me!"; "Got me--I don't know the answer!"; "a vexing problem"; "This question really stuck me";
See also: puzzle over, solve, figure out, puzzle out, lick, work out, work
Similiar / Same: puzzle, mystify, baffle, bewilder, flummox, nonplus, dumbfound, stupefy, amaze, gravel, vex, pose, stick, beat, get
Categories: bedevil, befuddle, confound, confuse, discombobulate, fox, fuddle, throw
Within this category: elude, riddle, stump
How to sign: make more complicated
"There was a new development that complicated the matter";
Similiar / Same: complicate
Categories: alter, change, modify
Within this category: complexify, snarl