必要不可欠(ひつようふかけつ)

ひつようふかけつ
na-adjective, noun
absolutely essential; indispensable
formaldescriptive
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(みず)は生活(せいかつ)に必要不可欠(ひつようふかけつ)だ。
Water is absolutely essential for daily life.
チームワークは成功(せいこう)に必要不可欠(ひつようふかけつ)な要素(ようそ)だ。
Teamwork is an indispensable element for success.
この地域(ちいき)の経済(けいざい)発展(はってん)には道路(どうろ)の整備(せいび)が必要不可欠(ひつようふかけつ)である。
Road development is absolutely essential for the economic growth of this region.

Usage

必要不可欠(ひつようふかけつ) is an emphatic expression formed by combining 必要(ひつよう) (necessary) with 不可欠(ふかけつ) (indispensable). It is somewhat redundant by design, used for strong emphasis. Common in formal writing, speeches, and business contexts.

Common patterns

  • Aに必要不可欠(ひつようふかけつ)だ (is absolutely essential for A)
  • 必要不可欠(ひつようふかけつ)な＋noun (an indispensable ...)
  • 必要不可欠(ひつようふかけつ)である (formal copula form)

Similar words

必要(ひつよう) means "necessary" and 不可欠(ふかけつ) means "indispensable" — either can be used alone with slightly less emphasis. 必要不可欠(ひつようふかけつ) is the strongest way to express absolute necessity.

Related Words

Synonym: 必要(ひつよう) (necessary (less emphatic))
Synonym: 不可欠(ふかけつ) (indispensable (less emphatic))
Compare: 欠(か)かせない (indispensable)
general
Added 2026.3.11 23:02 · Revised 2026.9.2 13:01
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