critical

US /ˈkrɪtɪkəl/

・

UK /ˈkrɪtɪkl/

Making a negative judgment of something
Of decisive importance with reference to the success or failure of something.
Essential for the success or functioning of something.
Expressing adverse or disapproving comments or judgments.
Expressing adverse or disapproving comments or judgments.
Being important or serious; vital; dangerous
Most important part
(of a disease or condition) very serious or dangerous.
(of a person) given to judging severely or finding fault.
(of a situation or problem) having the potential to become disastrous; at a point of crisis.
Of decisive importance with reference to the outcome of something; vital.
Relating to the analysis of texts, ideas, etc.
(of a sick or injured person) seriously ill or injured.
Expressing adverse or disapproving comments or judgments.

Examples

She became openly critical of party policy.

The report was highly critical of the railway's poor safety record.