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

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

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.

Show 2 more

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.