1.Definition: causing irritation or annoyance

"It is vexing to have to admit you are wrong"

Related Adjective(s):annoying, bothersome, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexatious

2.Definition: extremely annoying or displeasing

Related Adjective(s):exasperating, infuriating, maddening