必ひっ須す

also: ひっしゅ · ひっすう

ひ

っ

す

Common wordJLPTN1Freq.FrequencyTop 5,000

Meanings

noun which may take the genitive case particle 'no', na-adjective, noun

indispensable; essential; required; compulsory

Used for things that are absolutely necessary, mandatory, or cannot be done without. Often appears in formal, academic, or technical contexts.

この書しょ類るいは申しん請せいに必ひっ須すです。
This document is required for the application.
パスポートは海かい外がい旅りょ行こうに必ひっ須すの持もち物ものだ。
A passport is an essential item for overseas travel.

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Usage patterns

〈事こと〉が必ひっ須すであるfor something to be essential/mandatory
このプロジェクトには英えい語ご力りょくが必ひっ須すである。
English proficiency is essential for this project.
〈物もの〉を必ひっ須すとするto make something a required item/condition
大だい学がくはこの科か目もくを必ひっ須すとする。
The university makes this subject a required course.
〈人ひと〉に必ひっ須すの〈物もの〉something essential for a person
社しゃ会かい人じんには基き本ほん的てきなマナーが必ひっ須すだ。
Basic manners are essential for working adults.

Kanji

必invariably, certain, inevitable
須ought, by all means, necessarily

Related words· 6

必ひつ要ようN4
必要 is the common, everyday word for 'necessary,' while 必須 is stronger and implies something absolutely indispensable or mandatory, often in formal contexts.
不ふ可か欠けつN2
不可欠 also means 'indispensable' and overlaps closely with 必須, but 不可欠 tends to sound slightly more formal or emphatic about something being irreplaceable.
マスト
必須 is the formal, often official term for something mandatory, while マスト is a casual loanword implying desirability rather than strict obligation.
必ひっ携けい
必須 means 'mandatory/required' in a general sense (courses, conditions), while 必携 specifically refers to an item one must always carry with them.

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必ひつ要よう性せい
必須 means 'essential, mandatory' and is stronger and more absolute than 必要性, which just refers to the existence or degree of a need.
所しょ要よう
必須 stresses that something is indispensable or mandatory, whereas 所要 simply states what amount or item is required without implying it can't be skipped.

Opposites

任にん意いN1
任意 means 'optional' or 'voluntary,' the direct opposite of 必須, which means 'mandatory' or 'required' (e.g. 必須科目 vs 任意科目).
オプションN1
必須 describes something mandatory or required, in contrast to オプション which is by definition optional and not required.

Don't confuse with

必ひっ至し
必至 means 'inevitable' or 'certain to happen,' whereas 必須 means 'essential' or 'mandatory'; the two are easily confused because of their similar sound and kanji.
必ひっ修しゅうN1
必修 refers specifically to required academic subjects or credits, whereas 必須 is a broader word meaning 'essential' or 'indispensable' in any context.

Word family· 7

必ひっ須す格かく
indispensable case
必ひっ須す入にゅう力りょく
required field; mandatory entry
必ひっ須す属ぞく性せい
mandatory attribute; required attribute
必ひっ須す条じょう件けん
essential condition; prerequisite; must-have requirement
必ひっ須す科か目もく
required subject; compulsory course

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必ひっ須す脂し肪ぼう酸さん
essential fatty acid
必ひっ須すアミノ酸さん
essential amino acid

Written forms

必須Usage100%
- ひっす
  Standard kanji spelling with the most common reading.
- ひっしゅ
  Alternate reading; less common than ひっす.
- ひっすう
  Alternate reading; rarely used.
ひっしゅ
ひっすう

Etymology

Sino-Japanese compound of 必 (certainly, necessarily) and 須 (necessary, must). The reading ひっす is the most common, while ひっしゅ and ひっすう are less frequent variants.