不ふ可か欠けつ

ふ

か

け

つ

Common wordJLPTN2Freq.FrequencyTop 10,000

Meanings

1

na-adjective, noun

Used for something that is absolutely necessary and cannot be done without. Often appears in formal, business, or academic contexts.

このプロジェクトには彼かれの協きょう力りょくが不ふ可か欠けつだ。
His cooperation is indispensable for this project.

水みず

は

生せい

命めい

に

とっ

て

不ふ

可か

欠けつ

な

要よう

素そ

で

ある

。

Water is an essential element for life.

必ひつ要よう
必要 means 'necessary' or 'needed' and is more common in everyday speech. 不可欠 is stronger, implying something is absolutely indispensable.
必ひっ須す
必須 also means 'essential' or 'mandatory', often used for requirements or prerequisites. 不可欠 emphasizes that something cannot be omitted or replaced.

Compound of 不 (not) + 可欠 (possible to lack). The kanji 欠 means 'lack' or 'be missing', so 不可欠 literally means 'cannot be lacking'.