vex
[veks]

–verb (used with object)
1.to irritate; annoy; provoke: His noisy neighbors often vexed him.

2. to torment; trouble; distress; plague; worry: Lack of money vexes many.

3. to discuss or debate (a subject, question, etc.) with vigor or at great length: to vex a question endlessly without agreeing.

4. to disturb by motion; stir up; toss about.

5. to afflict with physical pain.