決まる

1. Origins, structure, and basic meaning

• Structure: 決まる, read きまる, means that something previously unsettled becomes decided.
• Basic usage: In 来月の会議の日程がようやく決まった。, the schedule for next month's meeting was finally settled.

2. Common pitfalls and similar expressions

• What becomes decided
  • This is an intransitive verb: が marks what is decided, as in 日程が and 勝者が. Its past form is 決まった, with a small っ.