essential

• 指绝对必要或极其重要的；也指某事物的本质或基本组成部分。

Describes something that is absolutely necessary or extremely important.

1. Absolutely necessaryB1formal

   Extremely important and necessary; something that cannot be done without.

   必需的

   • Water is essential for human survival.
   • It is essential that you arrive on time for the interview.
   • Good communication skills are essential in this job.

   同义词criticalcrucialfundamentalimperativeindispensablekeynecessaryprerequisiterequisitevital

   反义词dispensableexpendableinessentialnonessentialoptionalsuperfluousunnecessary

2. Fundamental or basicB1formal

   Relating to the most basic or important aspects of something.

   基本的

   • The essential elements of the theory were explained clearly.
   • We covered the essential points of the contract.
   • Understanding grammar is essential to learning a language.

   同义词basalbasicconstitutivecoreelementaryfundamentalkeyprimaryprincipalunderlying

   反义词accessoryincidentalperipheralsecondarysuperfluous

• 名词，指绝对必要、不可或缺或最核心的事物，也可指本质、要点。

A noun referring to something that is absolutely necessary, fundamental, or indispensable.

不可数

1. Fundamental elementB2formal

   A thing that is absolutely necessary or extremely important.

   必需之物

   • Water is an essential for all living organisms.
   • The course covers the essentials of programming.
   • Patience is an essential for any good teacher.

   同义词basiccorefundamentalindispensablekeymustnecessityprerequisiterequisitesine qua non

   反义词accessoryextrainessentialluxurynonessentialoption

2. Basic necessityB2formal

   An item or factor that is indispensable for a particular purpose or activity.

   必需品

   • Pack only the essentials for the camping trip.
   • Food and shelter are the essentials of survival.
   • The manual lists the essentials for setting up the device.

   同义词basicfundamentalmustnecessityneedprerequisiterequirementrequisite

   反义词extraluxurynonessential