必需 (bì xū) means “to need; to require; essential; indispensable”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
水是生命的必需品。
Shuǐ shì shēngmìng de bìxūpǐn.
Water is essential for life.
Updated: 2026-05-27