失格

1. Origins, structure, and basic meaning

• Structure: 失格 is read しっかく and is a noun for losing eligibility by failing to meet a rule or condition.
• Basic usage: It is used when an athlete or entry is excluded because of a rule violation or missed deadline.

2. Common pitfalls and similar expressions

• Common forms
  • 失格になる is common in ordinary statements about becoming disqualified, while 失格となる is often used in formal announcements of a ruling or result.