Vexatious 1100 Words You Need
difficult to deal with and causing a lot of annoyance, worry or argument, annoying, irritating, upsetting, troublesome, bothersome, exasperating, irksome, aggravating, distressing:
This settlement will resolve one of the most vexatious problems in the field of industrial relations.
Antonym: placatory, appeasing, soothing
Verb: vex: bother, annoy, provoke, irk, nettle, exasperate, peeve