How to say "incidental" in Japanese

• 付帯ふたいCommon
  suru verb, intransitive verb, no-adjectiveCovers incidental in the sense of 'ancillary, secondary': something that attaches to or accompanies a main thing rather than standing alone, as with incidental expenses or conditions in a contract.
• 偶発ぐうはつCommon
  suru verb, intransitive verb, no-adjectiveCovers incidental in the sense of 'accidental': an event that happens unexpectedly and by chance rather than by design, so it fits sudden, unplanned occurrences, not planned accompanying items.

Choose 付帯 for the ancillary sense of incidental, something secondary that accompanies a main thing; choose 偶発 for the accidental sense, an unexpected occurrence that merely happens by chance.

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

• 付帯ふたいincidental
• 偶発ぐうはつsudden outbreak
• 付帯的ふたいてきincidental
• 偶発的ぐうはつてきaccidental
• 付随的ふずいてきancillary
• 従じゅうsubordinate
• 従たるじゅうたるsubordinate