critical
adjective
uk/ˈkrɪtɪkəl/ usextremely important to the progress or success of something:
critical to/for sth Logistics and distribution are critical to an e-commerce venture's success.
Critical decisions need to be taken.
We see this as a critical time and potentially a turning point in the crisis.
extremely serious or dangerous:
be in critical condition As a result of unchecked pollution, the Chesapeake Bay is in critical condition.
The company had a loss of $511,000 and a critical shortage of cash.
saying that someone or something is bad or wrong:
A highly critical report was released Tuesday on BP's five U.S. refineries.
critical of sb/sth He is very critical of his manager.
using careful judgment:
We need to do some critical thinking to solve this problem.
critically
adverb
The small business market as a whole is critically important.
Regional or bilateral trade deals need to be looked at more critically.