大幅

1. Origins, structure, and basic meaning

• Structure: 大幅(おおはば) indicates a substantial extent or degree of change.
• Basic usage: It states that manufacturing costs were substantially reduced.
  • 原料を見直し、製造費を大幅に削減した。

2. Common pitfalls and similar expressions

• Forms for different grammatical roles
  • 大幅な削減 modifies the noun meaning reduction, while 大幅に削減する describes how substantially something is reduced.
• Direction and extent
  • Both 大幅な増加 and 大幅な減少 are possible. 大幅 describes the size of a change; the following word supplies its direction.