1.
absolutely essential; indispensable
Expresses that something is so necessary it cannot be done without. A strong emphatic compound combining 必要 (necessary) and 不可欠 (indispensable).
水は生活に必要不可欠だ。
Water is absolutely essential for daily life.
チームワークは成功に必要不可欠な要素だ。
Teamwork is an indispensable element for success.
この地域の経済発展には道路の整備が必要不可欠である。
Road development is absolutely essential for the economic growth of this region.
USAGE:
必要不可欠 is an emphatic expression formed by combining 必要 (necessary) with 不可欠 (indispensable). It is somewhat redundant by design, used for strong emphasis. Common in formal writing, speeches, and business contexts.
PATTERNS:
- Aに必要不可欠だ (is absolutely essential for A)
- 必要不可欠な＋noun (an indispensable ...)
- 必要不可欠である (formal copula form)
SIMILAR WORDS:
必要 means "necessary" and 不可欠 means "indispensable" — either can be used alone with slightly less emphasis. 必要不可欠 is the strongest way to express absolute necessity.