Example : Mosquitoes buzzing in my ear really bothers me.
It irritates me that she never closes the door after she leaves.

Synonyms : annoy, bother, chafe, devil, get at, get to, gravel, irritate, nark, nettle, rag, rile

Example : I cannot sleep--my daughter's health is worrying me.

Synonyms : worry

Synonyms : agitate, commove, disturb, raise up, shake up, stir up

Example : Vex the subject of the death penalty.

Example : This beats me!.
Got me--I don't know the answer!.
A vexing problem.
This question really stuck me.

Synonyms : amaze, baffle, beat, bewilder, dumbfound, flummox, get, gravel, mystify, nonplus, perplex, pose, puzzle, stick, stupefy