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HSK 7-9
mustnotcanshǎolack
Absolutely necessary; indispensable.

Literal meaning

must (必) — not (不) — can (可) — lack (少)

Origin

A classical four-character phrase emphasizing necessity.

Examples

shuǐshìshēngmìngzhōngshǎode
Water is indispensable to life.
diànnǎojīngchéngwéixiàndàishēnghuózhōngshǎodegōng
Computers have become an indispensable tool in modern life.

Usage & nuances

Emphasizes the critical importance of something.

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