retroactively
01
遡及的に, 遡及して
in a way that something takes effect from a date earlier than its official approval or implementation
例
The new tax law was applied retroactively to cover income earned in the previous year.
新しい税法は、前年に得た所得をカバーするために遡及的に適用されました。
語彙ツリー
retroactively
retroactive
retro
active
