• 脆弱ぜいじゃく

  weak, frail, fragile

• 脆いもろい

  brittle, fragile, weak, frail

• 脆化ぜいか

  embrittlement

• 脆性ぜいせい

  brittleness

• 脆弱性ぜいじゃくせい

  vulnerability, weakness, fragility

• 脆くももろくも

  quickly (succumb, collapse, etc.), easily, without resistance (despite hopes to the contrary)

• 脆弱国家ぜいじゃくこっか

  fragile state

• 水素脆化すいそぜいか

  hydrogen embrittlement

• ゼロデイ脆弱性ゼロデイぜいじゃくせい

  zero-day vulnerability