crucial

/ˈkɹuː.ʃəl/adjective

So important that the outcome or future of something depends on it.

Example sentences

“Getting enough rest is crucial before a big exam.”
“Her testimony proved crucial to winning the case.”

Heavily overused in reports and emails; save it for genuine turning points. 'Critical' and 'decisive' are close synonyms.

Synonyms for crucial

vital
essential
critical
decisive
key

Antonyms

unimportant
insignificant
trivial

On the Academic Word List. Find it in: Academic vocabulary.

Related words

imperativeAbsolutely necessary; of the greatest importance.pivotalExtremely important because other things depend on it; central to an outcome.crudeMade or done in a simple, rough way, without much skill or detail.cricketAn outdoor team sport in which two sides of eleven players use a bat and ball, widely played in England and Commonwealth nations.cruiseA trip by ship or boat, usually one taken for enjoyment.crestfallenFeeling down or discouraged after something has disappointed you.