How to say "secure" in Japanese

• 大丈夫だいじょうぶJLPT N5approx.Common
  na-adjectiveCovers 'secure' in the sense of being safe and free from harm or problems, often in reassurances that everything is all right. This is usually the word you want when asking whether someone or something is safe.
  彼女かのじょは今いまのところ大丈夫だいじょうぶです。↗

  She is all right at the moment.
• 無難ぶなんJLPT N1approx.Common
  na-adjective, nounCovers 'secure' as in a safe, risk-free choice that offends no one — 'a secure option'. It suggests something innocuous rather than truly protected, so it fits decisions, not physical safety.
  男性だんせいの一部いちぶと女性じょせいの一部いちぶが計算けいさんは速はやいと言いうほうが無難ぶなんだ。↗

  It is safer to say that some men and some women are good at figures.
• 得るえるJLPT N3approx.Common
  ichidan verb, transitive verbCovers the verb sense 'to secure', meaning to obtain or acquire something such as a victory, position, or resource. Use this when 'secure' means successfully getting hold of something.
  １０チームが賞しょうを得えようと争あらそった。↗

  Ten teams competed for the prize.
• 確実かくじつJLPT N3approx.Common
  na-adjective, nounCovers 'secure' in the sense of certain, sure, or reliable — a secure investment or a secure foothold. It emphasizes confidence that something will hold or happen as expected.
  これは遅おそいけど確実かくじつな方法ほうほうだ。↗

  This is a slow but certain way.
• 厳重げんじゅうJLPT N2approx.Common
  na-adjective, nounStrictly speaking this means strict, stringent, or rigorous, so it maps to 'secure' only via descriptions of tight security or strict guarding, as in heavily secured premises. For most other senses of 'secure' it is not the word you want.
  トップエンジニアが、その車くるまに一連いちれんの厳重げんじゅうな検査けんさを加くわえた。↗

  The top engineer put the car through a series of rigorous tests.

English 'secure' covers safety, reliability, obtaining, and protection, so pick the Japanese word by sense: state of safety, an unremarkable choice, acquiring something, certainty, or strict guarding.

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

• 大丈夫だいじょうぶsafe
• 無難ぶなんsafe (e.g. choice)
• 得るえるto get
• 確実かくじつcertain
• 厳重げんじゅうstrict
• 勝ち取るかちとるto win
• 手堅いてがたいsound
• 手に入れるてにいれるto obtain
• セキュアsecure
• 安固あんこsecure
• 心丈夫こころじょうぶsecure
• 作り付けるつくりつけるto fix (e.g. to a wall)
• ものにするto get
• 厳にするげんにするto strengthen
• 揺るぎないゆるぎないfirm
• 得うto get
• 確かなものにするたしかなものにするto strengthen
• 得るうるto get
• 取り付けるとりつけるto (manage to) obtain (someone's agreement, permission, etc.)
• 繋ぎ止めるつなぎとめるto secure (trust, patronage of customers, etc.)
• 取るとるto secure
• かけるto secure (e.g. lock)
• 占めるしめるto gain
• 押さえるおさえるto reserve (time, space, or availability)