noi·some \ˈnȯisəm\adjective Etymology: Middle English noysome, from noy annoy (alteration of anuy, anoi) + -some — more at annoy (n.) 1.: noxious, harmful, unwholesome, destructive < a noisome environment > 2.: offensive to the smell or other senses : disgusting, distasteful < foul breath is noisome — Shakespeare > 3.obsolete: annoying • noi·some·lyadverb • noi·some·nessnoun-es