critical

The word “critical” means extremely important, often because a lot depends on it. In plain terms, either "extremely important," "fault-finding," or "in a dangerous condition," depending on context.

“Critical” is pronounced KRIHT-ih-kuhl (/ˈkɹɪt.ɪ.kəl/ in IPA).

Here is “critical” used in a sentence: “Getting enough sleep is critical for good health.”

“Critical” is an adjective.

The word “critical” comes from Latin. From Latin criticus + the adjective suffix -al, ultimately from Greek kritikos, "able to judge.".

“Critical” is a very common word in modern English, usually learned at around the B1 level.

“Critical” has 4 distinct senses listed in this dictionary. The most common is: extremely important, often because a lot depends on it.

Both describe something extremely important, and they often overlap. Critical stresses high stakes — a moment where failure could be serious or even dangerous. Crucial stresses that something is decisive, the factor a result depends on. A critical situation may be dangerous; a crucial decision is the one that determines the outcome.

No. Critical has several senses. It can mean extremely important, as in a critical stage. It can also mean finding fault or expressing disapproval, as in a critical review. In academic use it means analytical and evaluative, as in critical thinking. Context tells you which meaning applies.

It depends on the meaning. When it describes importance — a critical decision — it is neutral, simply signalling that a lot is at stake. When it describes criticism — being critical of someone — it carries a negative tone. And in critical thinking it is positive, praising careful judgement.

In the sense of extremely important, you might say, 'The next few hours are critical to the patient's recovery,' meaning a great deal depends on them. Other examples include 'a critical shortage of water' or 'reaching a critical point,' where the word signals urgency and high stakes.