- vi. 衰退，[核] 衰减；腐烂，腐朽
- n. 衰退，[核] 衰减；腐烂，腐朽
- vt. 使腐烂，使腐败；使衰退，使衰落
- n. (Decay)人名；(法)德凯
CET4 TEM4 IELTS 考 研 TOEFL CET6
de-, 向下。-cay, 同-cad, 掉落，词源同case, accident. 引申义腐烂。
- decay:  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  was acquired via the medieval derivative dēcadentia. To the same word-family belongs deciduous , from Latin dēciduus, literally denoting the ‘falling off’ of leaves from trees.
=> accident, case, chance, decadence, deciduous
- decay (v.)
- 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.
- decay (n.)
- mid-15c., "deterioration, decline in value," from decay (v.). Meaning "gradual decrease in radioactivity" is from 1897.
- 1. When not removed, plaque causes tooth decay and gum disease.
- 2. There are problems of urban decay and gang violence.
- 3. The phosphate was deposited by the decay of marine microorganisms.
- 4. The landlord had let the building fall into decay .
- 5. The decay of the meat could have been prevented by proper refrigeration.
[ decay 造句 ]