Causing irritation or annoyance. Synonyms: annoying, galling, irritating, nettlesome, pesky, pestering, pestiferous, plaguey, plaguy, teasing, vexatious, vexing. "Aircraft noise is particularly bothersome near the airport" , "Found it galling to have to ask permission" , "An irritating delay" , "Nettlesome paperwork" , "A pesky mosquito" , "Swarms of pestering gnats" , "A plaguey newfangled safety catch" , "A teasing and persistent thought annoyed him" , "A vexatious child" , "It is vexing to have to admit you are wrong"