vex (Verb) — Cause annoyance in; disturb, especially by minor irritations. ex. "Mosquitoes buzzing in my ear really vexes me"
vex (Verb) — Disturb the peace of mind of; afflict with mental agitation or distress. ex. "I cannot sleep--my daughter's health is vexing me"
vex (Verb) — Change the arrangement or position of.
vex (Verb) — Subject to prolonged examination, discussion, or deliberation. ex. "vex the subject of the death penalty"
vex (Verb) — Be confusing or perplexing to; cause to be unable to think clearly. ex. "a vexing problem"