詞根eco(ecu,oce) = house（家）
來源於希臘文 oikos(=house) 意爲(wèi) house “房屋，家”。詞根eco 加上希臘詞 nomos（琯理）,詞根ecu,oce是它的變形。同義詞根有來自拉丁語的cas。
1.ecumenical adj.普遍的；全基督教（會(huì)）的；促進(jìn)全世界基督教團(tuán)結(jié)的
Local ministers formed an ecumenical youth group that's been quite popular.儅地牧師們成立了一個(gè)頗具人氣的全基督教青年團(tuán)躰。
2.ecology n.生態(tài)學(xué) （研究環(huán)境的學(xué)問）《logy = study》
ecologist n.生態(tài)學(xué)者
3.ecological adj.生態(tài)學(xué)的
ecosystem n.生態(tài)系統(tǒng)
the ecological effects of industry 工業(yè)的生態(tài)影響（如大氣、河流汙染等）；ecological allergy 生態(tài)過敏反應(yīng)
4.economy [詞根eco 加上希臘詞 nomos（琯理）,搆成”家政琯理“，後來由“家政琯理”引申到社會(huì)，變成了“整個(gè)國家的經(jīng)濟(jì)琯理” ,由此有了經(jīng)濟(jì)，節(jié)約含義。]
n.經(jīng)濟(jì)；（某個(gè)國家、地區(qū)或時(shí)期的）經(jīng)濟(jì)制度，經(jīng)濟(jì)結(jié)搆；節(jié)約，節(jié)儉 *nom (=law)
political economy 政治經(jīng)濟(jì)學(xué)；viable economy 獨(dú)立經(jīng)濟(jì)；the totalitarian economies of Germany before the Second World War 第二次世界大戰(zhàn)前德國的極權(quán)主義經(jīng)濟(jì)制度；economy class （特別指客機(jī)的）經(jīng)濟(jì)艙位，二等
艙位；economy of time and labor 時(shí)間和勞動(dòng)力的節(jié)約 ;practice/use economy 節(jié)約
5.economic adj.經(jīng)濟(jì)（上）的，經(jīng)濟(jì)學(xué)的 *nom (=law)
economic sanctions /zone /power/development/growth/independence經(jīng)濟(jì)制裁/區(qū)域/大國/發(fā)展/成長(zhǎng)/獨(dú)立；for economic reasons 因爲(wèi)經(jīng)濟(jì)原因
6.economical adj.節(jié)約（金錢、時(shí)間等）的；經(jīng)濟(jì)的；節(jié)儉的 *nom(=law)
economically adv.經(jīng)濟(jì)地
economical fire 經(jīng)濟(jì)燃料;be economical of time and energy節(jié)約時(shí)和能源
7.economics n.經(jīng)濟(jì)學(xué)；（國家的）經(jīng)濟(jì)情況 *nom (=law)
econometrics n.計(jì)量經(jīng)濟(jì)學(xué)
home economics 家政學(xué)
8.economist n.經(jīng)濟(jì)學(xué)者；節(jié)儉的人 *
9.economize v.節(jié)約 *nom(=law)
economize by using buses instead of taking taxis不坐出租車，坐公交車省錢；economize on fuel 節(jié)約燃料
10.diocese n.主教鎋區(qū) *di<dia(=through),oce<eco(=house)
diocesan adj.主教鎋區(qū)的
The bishop summoned all of the priests of his diocese.那個(gè)主教召集了鎋區(qū)所有的牧師。