兆す

1. Origins, structure, and basic meaning

• Structure: 兆す (きざす) is an intransitive verb for signs of a season, feeling, or change beginning to emerge.
• Basic usage: 春が兆してきた shows signs of spring emerging over time; 希望が兆した reports hope arising in the heart.

2. Common pitfalls and similar expressions

• Seasonal signs and emerging hope
  • What emerges takes が. てきた traces the change up to the present, while 兆した reports its occurrence.