| 词汇 | decay |
| 词根词缀 | 词源： c.1460, from O.Fr. decair, from V.L. *decadere "to fall off," from L. cadere "to fall" (see case (1)). Meaning "gradual decrease in radioactivity" is from 1897. 词根记忆： v. /n.腐朽,腐烂;衰减,衰退The academic topic is why the blade of the spade is still sharp after decades' decay.学术话题是为什么铁锨刃口经过几十年的腐烂之后仍然锋利. 衰退;腐败(de向下+cay=落下→向下掉→衰退)[cad,cas,cid=fall,表示"落下,降临"] 词根词缀： decay decay衰退,腐败(de向下+cay=落下=向下掉=衰退) cad, cas, cid=fall,表示”落下,降临”casual偶然的(cas+ual=落下的=不是安排好的=偶然的) casualty事故,灾难(casual+ty=[突然]落下的事=事故) occasion发生,时机(oc使+cas落下+ion=使…落下=事情发生) decaent颓废的accidental偶然的(accident事故+al) coincide巧合,同时发生coincidence巧合incident偶然事件occident西方(oc使+cid落+ent=使(太阳) 落下=西方) decay衰退,腐败(de向下+cay=落下=向下掉=衰退) |
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