bù​kě​huò​quē

indispensable

不可或缺 bù​kě​huò​quē
indispensable expression
absolutely necessary; essential; cannot be dispensed with

Smartphones have become an indispensable tool in modern life.

Frequency

Movie subtitles
1.10 per million appears in 1% of films
Written text
4.83 per million

Sources

Definitions
CC-CEDICT