critical /ˈkrɪtɪkəl/ adjective
NOT PLEASED › saying that someone or something is bad or wrong: a critical report He is very critical of the way I work.
IMPORTANT › very important for the way things will happen in the future: a critical decision
SERIOUS › extremely serious or dangerous: The doctors said her condition was critical and she might not survive.
OPINIONS › giving judgments and opinions on books, plays, films, etc: a critical study of Tennyson's work critically adverb