decay是什么意思（decay的用法）

大家好，知识小编来为大家讲解下。decay是什么意思，decay的用法很多人还不知道，现在让我们一起来看看吧！

一、decay是什么意思

1、decay 腐烂

2、de-, 向下。-cay, 同-cad, 掉落，词源同case, accident. 引申义腐烂。

二、decay的用法

1、decay

2、decay: [15] The notion underlying decay and its close relative decadence is of a ‘falling off’ from a condition of health or perfection. Decay comes from Old Northern French decair, a descendant of Vulgar Latin *dēcadere, which in turn came from Latin dēcidere, a compound verb formed from the prefix dē- ‘down, off, away’ and cadere ‘fall’ (source of English case and a wide range of related words). Decadence [16] was acquired via the medieval derivative dēcadentia. To the same word-family belongs deciduous [17], from Latin dēciduus, literally denoting the ‘falling off’ of leaves from trees.=> accident, case, chance, decadence, deciduous

3、decay (v.)

4、late 15c., "to decrease," from Anglo-French decair, Old North French decair (Old French decheoir, 12c., Modern French déchoir) "to fall, set (of the sun), weaken, decline, decay," from Vulgar Latin *decadere "to fall off," from de- (see de-) + Latin cadere "to fall" (see case (n.1)). Meaning "decline, deteriorate" is c. 1500; that of "to decompose, rot" is from 1570s. Related: Decayed; decaying.

5、decay (n.)

6、mid-15c., "deterioration, decline in value," from decay (v.). Meaning "gradual decrease in radioactivity" is from 1897.

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