cataclysm洪水;大災(zāi)難(cata離開+clysm洪水,沖→被洪水沖掉→大災(zāi)難)
catalog目錄(cata向下+log說→在下面要說的話→目錄)
catastrophe災(zāi)難,大禍(cata+strophe轉(zhuǎn)→轉(zhuǎn)下去→災(zāi)難臨頭)
cataract大瀑布(cata+ract沖→向下沖→瀑布)
2. deca-表示“十”
decagon十角形(deca+gon角)
decameter十米(deca+meter米)