How to say "unwanted" in Japanese

• 好ましからざるこのましからざる
  prenominal modifierCovers 'unwanted' as unwelcome or undesirable — something one does not wish for. A less common word: it really says 'unwelcome' or 'undesirable' rather than 'not needed'.
• 用無しようなし
  no-adjectiveCovers 'unwanted' as unnecessary, unneeded, or useless — something is not wanted because it has no use or is not needed. A less common word.
  退職者たいしょくしゃは、自分じぶんたちを用ようなしで非生産的ひせいさんてきと感かんじることが多おおい。↗

  The retired often feel that they are useless and unproductive.
• 余計よけいJLPT N2approx.Common
  na-adjectiveCovers 'unwanted' as unnecessary or needless, and also describes a remark or action that is uncalled-for. A common word, and the usual choice for this sense of 'unwanted'.
  こんな余計よけいな機能きのうなんでつけたんだろう。↗

  What did they add this needless function for?

Use the common 余計 for unwanted meaning unnecessary, needless, or uncalled-for; the less common 「用無し」 for unwanted as unnecessary, unneeded, or useless; and the less common 「好ましからざる」 for unwelcome or undesirable.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 好ましからざるこのましからざるunwelcome
• 用無しようなしunnecessary
• 余計よけいunnecessary