That family once wielded great influence in this town.
vigor; energy; boldness; high spirits
Describes lively, forceful, or bold spirit, often in expressions such as 威勢がいい and 威勢よく. It can be positive, but may also imply loud bravado depending on context.
市場では店員たちが威勢よく客に声をかけていた。
At the market, the shop staff were energetically calling out to customers.
彼は威勢のいいことを言ったが、結局何もしなかった。
He talked boldly, but in the end he did nothing.
He has held sway over that region for many years.
The young men were acting tough all over town.
The new leader showed his authority to his subordinates.