勢い

1. Origins, structure, and basic meaning

• Structure: 勢い is read いきおい and means momentum or force in movement or progress.
• Basic usage: It is used for a team gaining momentum and for water rushing with great force.

2. Common pitfalls and similar expressions

• A team's momentum
  • チームの勢い refers to a team's momentum in a game.
• Force of flow
  • すごい勢いで流れ出た describes water rushing out with tremendous force.