須

Necessary

Level 86

How this kanji evolved

Explore each form from the oldest known stage to today.

The character 須 (xū) originally depicted a face with prominent whiskers or beard, as seen in its oracle bone script form showing a person with three hairs on the chin. This pictorial representation evolved through bronze script and seal script periods, gradually standardizing into its modern form. The character's core meaning relates to 'necessary' or 'must,' possibly derived from the notion that facial hair is a natural, inevitable growth. In ancient Chinese texts, 須 came to represent concepts of necessity, requirement, and waiting (as one must wait for something necessary). The character also appears in compounds like 必須 (must) and 須要 (need), maintaining this fundamental meaning of obligation and necessity throughout its evolution. Arrived in Japan: The character 須 arrived in Japan during the 5th-6th centuries CE as part of the broader introduction of Chinese writing system (kanji) through Buddhist texts and Chinese classical literature. It was formally incorporated into the Japanese writing system and appears in early Japanese works like the Man'yōshū (8th century), where it was used both for its meaning and as a phonetic character. The character continues to be used in modern Japanese in words like 必須 (hissu - necessary) and personal names.

Reading reference

Onyomi (音読み)

スシュ

Kunyomi (訓読み)

すべからすべしひげまつもちもと

Related Vocabulary

必須
indispensable, essential, requisite, required, compulsory, necessary
必須条件
essential condition