How to say "obsolete" in Japanese

• 古臭いふるくさいCommon
  i-adjectiveA common word for 'obsolete' in the sense of outdated: ideas, styles, or expressions that feel stale, hackneyed, or behind the times. It describes a dated impression, not something formally abolished or out of use.
  私は彼かれの古ふるくさい冗談じょうだんにうんざりした。↗

  I was bored with his old jokes.
• 廃はい
  noun (prefix)A less common word for 'obsolete' as abolished or out of use — things no longer in operation. It is seldom the word you want on its own; for something that seems dated, 古臭い fits better.

Use 「古臭い」 for the everyday sense of obsolete — something that seems stale, old-fashioned, or behind the times — and 廃 for things abolished or out of use, though 廃 is less common and seldom used on its own.

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

• 古臭いふるくさいstale
• 廃はいabandoned