How to say "quarantine" in Japanese

• 検疫けんえきCommon
  noun, suru verb, transitive verb, intransitive verbThe official, medical sense: inspecting and holding people, animals, or goods arriving from abroad to keep disease out. This is the word for quarantine at airports, ports, and borders.
• 停船ていせんCommon
  noun, suru verb, intransitive verbLiterally the stopping of a ship; its 'quarantine' sense is the maritime one of a vessel being held. For quarantine in general this is seldom the word you want.
• 隔離かくりCommon
  suru verb, transitive verb, intransitive verb, no-adjectiveIsolation: keeping an infected or possibly infected person or animal physically apart from others. For isolating an individual, whether sick or exposed, this is the word that covers 'quarantine'.
  その伝染病でんせんびょう患者かんじゃは他たの患者かんじゃから隔離かくりされた。↗

  The infectious case was isolated from other patients.
• 遮断しゃだんCommon
  noun, suru verb, transitive verbCutting off or blockading: shutting something off from contact, communication, or supplies. Its link to 'quarantine' is marginal; it is really about being cut off, not about quarantine itself.
  がけくずれで交通こうつうは遮断しゃだんされた。↗

  Traffic was blocked by a landslide.
• 待機たいきCommon
  noun, suru verb, intransitive verbQuarantine as waiting: remaining where you are on standby until a set period passes or you are cleared. The nuance is holding back and waiting, not the medical inspection itself.

Use 検疫 for official medical quarantine at borders, 隔離 for isolating an infected person or animal, and 待機 for quarantine as waiting; 停船 and 遮断 are really about stopping ships and cutting things off, not quarantine proper.

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

• 検疫けんえきquarantine
• 停船ていせんstopping a ship
• 隔離かくりisolation
• 遮断しゃだんisolation
• 交通遮断こうつうしゃだんblockage
• 待機たいきquarantine