| 单词 | essential |
| 释义 | essential adj. & n. --adj 1. absolutely necessary; indispensable. 2. fundamental, basic. 3. of or constituting the essence of a person or thing. 4. (of a disease) with no known external stimulus or cause; idiopathic. --n (esp. in pl.) a basic or indispensable element or thing. Phrases and idioms essential element any of various elements required by living organisms for normal growth. essential oil a volatile oil derived from a plant etc. with its characteristic odour. Derivatives essentiality n. essentially adv. essentialness n. Etymology: ME f. LL essentialis (as ESSENCE) |
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