How to say "eradicate" in Japanese

• 絶やすたやすCommon
  godan verb, transitive verbCovers eradication as wiping something out completely — exterminating pests or a species, or putting an end to strife. The image is making something cease to exist entirely.
  麻薬まやくの密売みつばいは根ねこそぎ絶たやさなければならない。↗

  We must eradicate the drug traffic, root and branch.
• 消し去るけしさるCommon
  godan verb, transitive verbFits the sense of making something vanish completely, as if wiped or erased away — dispelling fear or doubt, or erasing something from existence. It stresses the act of removal itself.
• 断つたつJLPT N1approx.Common
  godan verb, transitive verbTreats eradication as cutting something off at its source or putting a stop to it, in line with its basic sense of severing. It suits suppression rather than wiping something out of existence.
• なくすJLPT N5approx.Common
  godan verb, transitive verbThe broadest choice: it simply means to get rid of or eliminate something — poverty, disease, a bad habit — so it fits 'eradicate' whenever no special image of extermination or erasing is needed.
  その国くにの財政ざいせいの赤字あかじをなくすには、もっと、たくさんの外国がいこくの援助えんじょを注ぎ込そそぎこまなければならなかった。↗

  To get the nation's economy out of the red, more foreign aid had to be pumped in.

Choose 「絶やす」 for wiping something out of existence, 「消し去る」 for making it vanish as if erased, 「断つ」 for cutting it off at the source, and 「なくす」 as the broadest word for simply eliminating it.

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

• 絶やすたやすto exterminate
• 消し去るけしさるto get rid of
• 退治るたいじるto exterminate
• 断つたつto suppress
• なくすto get rid of