尋常

1. Origins, structure, and basic meaning

• Structure: The spelling is 尋常, read じんじょう, and it functions as a noun or na-adjective for an ordinary or normal state.
• Basic usage: 尋常 means that a degree, condition, or method falls within the usual and unexceptional range.

2. Common pitfalls and similar expressions

• Extraordinary degree under negation and an ordinary method affirmatively
  • Both examples use the form 尋常. 尋常ではない emphasizes recovery outside the normal range, while 尋常な方法 identifies a conventional method unable to solve the problem.
• Unusually fast recovery and an inadequate normal approach
  • 彼の回復の速さは尋常ではありませんでした。 — The speed of his recovery was extraordinary.
  • 尋常な方法では、この難題を解決できません。 — This difficult problem cannot be solved by ordinary methods.