critical
CEFR: B2
Extremely important, essential, and decisive for the success, survival, or failure of a technological system; or expressing adverse criticism.
Synonyms
- crucial
- indispensable
- pivotal
Common Collocations
- critical thinking
- critical condition
- critical factor
Example Sentence
Achieving a high-vacuum seal was a critical prerequisite for preventing carbon filaments from combusting prematurely.