ひつ
必
よう
要

adjectival noun or quasi-adjective

必用 can imply has to be used rather than is just needed.
  1. necessary, needed, essential, indispensable.

noun

  1. necessity, need, requirement.

Variations

Pronunciation Kanji Kana Is Common
ひつ
必
よう
要
 必要 ひつよう ✔
ひつ
必
よう
用
 必用 ひつよう

Contained Kanji Breakdown

invariably, certain, inevitable
ヒツ　かなら.ず (4th, N3)
heart, mind, spirit
こころ　シン (2nd, N4)
katakana no radical (no. 4)
ヘツ　えい　よう (Kentei 1)
need, main point, essence
ヨウ　い.る　かなめ (4th, N3)
variant of radical 146
woman, female
ジョ　おんな　め (1st, N5)