不振

1. Origins, structure, and basic meaning

• Structure: 不振, read ふしん, combines negation 不 with vigor or swing 振 to express failure to gain momentum.
• Basic usage: It denotes performance below an expected level, as in 売上不振 or 成績が不振だ.

2. Common pitfalls and similar expressions

• Scope and context
  • It can mean a continuing slump over a period rather than one complete failure 失敗.