| 单词 | essential |
| 释义 | essential —essentially, adv. —essentialness, n. /euh sen"sheuhl/, adj. 1. absolutely necessary; indispensable: Discipline is essential in an army. 2. pertaining to or constituting the essence of a thing. 3. noting or containing an essence of a plant, drug, etc. 4. being such by its very nature or in the highest sense; natural; spontaneous: essential happiness. 5. Math. a. (of a singularity of a function of a complex variable) noting that the Laurent series at the point has an infinite number of terms with negative powers. b. (of a discontinuity) noting that the function is discontinuous and has no limit at the point. Cf. removable (def. 2). n. 6. a basic, indispensable, or necessary element; chief point: Concentrate on essentials rather than details. [1300-50; ME essencial < ML essencialis for LL essentialis. See ESSENCE, -AL1] Syn. 1. fundamental, basic, inherent, intrinsic, vital. See necessary. 2. ESSENTIAL, INHERENT, INTRINSIC refer to that which is in the natural composition of a thing. ESSENTIAL suggests that which is in the very essence or constitution of a thing: Oxygen and hydrogen are essential in water. INHERENT means inborn or fixed from the beginning as a permanent quality or constituent of a thing: properties inherent in iron. INTRINSIC implies belonging to the nature of a thing itself, and comprised within it, without regard to external considerations or accidentally added properties: the intrinsic value of diamonds. Ant. 2. incidental, extraneous, extrinsic; accidental. |
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