精選寫作用字(字源解析)
1. dict, dic = say, assert, 表示“說話，斷言”
拉丁文dicare
dictate  v 口授，命令，聽寫（dict+ate 說話→口授，命令）
The victorious country dictated the terms of peace to the defeated country.
dictator  n 發命令者，獨裁者（dictate+or→發命令者）
Mussolini, Hitler's fellow fascist dictator and partner in aggression, had met his end.
diction  n 措詞，用語（dict+ion名詞→措詞）
Her prose brims with poetic diction.
dictionary  n 字典（diction+ary→措詞的書→字典）
Consult a dictionary when you are uncertain about any word usage.
dictum  n 格言，斷言（dict+um→說出的話→格言）
The dictum "That government is best which governs least" is often attributed toThomas Jefferson.
contradict  v 反駁，與...矛盾（contra反+dict→說反話→反駁）
The two accounts contradict each other.
contradictory  a 矛盾的，對立的
contradictory statements / remarks / facts / statistics
predict  v 預言，預告（pre預先+dict）
Sales were five percent lower than predicted.
indict  v 起訴，控訴
He was later indicted on corruption charges.
abdicate  v 放棄，退位（ab離開+dic說，命令 + ate→不再命令→退位）
The king was forced to abdicate the throne.
dedicate  v 獻身於，致力於（de加強+dic說+ate）
I dedicate this volume to my wife in token of affection and gratitude.
valediction  n 告別演說，告別辭（vale再見+dict +ion →說再見）
She delivered a touching valediction at the graduation ceremony.
verdict  n（陪審團的）裁決（ver真實+dict→說真實話→裁決）
Members of the jury, have you reached your verdict?
2. log, logu = speak, 表示“說話”
拉丁文loqui
logic  n 邏輯（學）（說話的學問→邏輯學）
There's no logic in his argument.
logical  a 有邏輯的
logical analysis / argument / explanation / conclusion
analogy  n 類比（ana一樣+logy→說的一樣→類比）
The author draws analogies between human and animal behavior.
analogous  a 類似的
The company is in a position closely analogous to that of its main rival.
apology  n 道歉（apo 離開+logy→退後一步說→道歉）
I feel I owe you an apology.
catalogue  n 目錄（cata 下面+logue 在下面要說的話→目錄）
This report is filled with an appalling catalogue of errors.
dialogue  n 對話（dia穿越兩者之間+logue）
There is a need for constructive dialogue between leaders.
prologue  n 開場白，序言（pro在前+logue→在前面說）
The prologue to the novel is written in the form of a newspaper account.
epilogue  n 收場白，結語，後記（epi在後+logue→在後面說）
This striking failure was a disastrous epilogue to his career.
eulogy  n 頌詞，哀悼詞（eu好+logy→說好話）
The author delivered a long eulogy in the funeral.
monologue  n 獨白（mono一個人+logue說→獨白）
Ted ignored the question and carried on with his monologue.
3. vor = eat, 表示"吃"
voracious  a 貪食的（vor+acious多…..的） /  voracity  n
Teenagers can have voracious appetites.
a voracious reader
devour  v 吞吃（de下去+vour [=vor]→吃下去→吞吃）
The raging sea devoured the boat.
herbivorous  a 草食性的（herbi草+vor+ous） /  herbivore  n
Herbivorous animals, such as sheep, have very small canine teeth, or none.
carnivorous  a 肉食性的（carni肉+vor+ous） /  carnivore  n
Among the carnivorous animals are the leopard, lion, and tiger.
omnivorous  a 雜食性的（omni全部+vor+ous→全部都吃→雜食性的）/ omnivore  n
Brown bears are omnivorous, eating anything that they can get their paws on.
insectivorous  a 食蟲的（insect昆蟲+i+vor+ous） /  insectivore  n
An insectivorous plant, also called a carnivorous plant, captures prey items, such as insects and spiders.
4. am, amor, amat = love, 表示“愛，情愛”
拉丁文 amare
amatory  a 戀愛的；色情的（amat+ory→愛的）
The amatory affairs of celebrities never fail to catch people's eyes.
amiable  a 和藹的，友善的（ami+able能…的→能愛的→親切的）
The chauffeur is an amiable young man.
amicable  a 友好的，溫和的（am+ic+able→能愛的→友好的）
The two parties have reached an amicable settlement.
amity  n 友好，和睦（am+ity 狀態→愛的狀態→和睦）
Amity between the two nations will contribute to the prosperity of the region.
enmity  n 敵意，仇恨（en 進去+am+ity→合成enmity,愛太多,由愛生恨）
The wartime enmity of the two nations subsided into mutual trust when peace finally came.
5. vol = will, 表示“意志，意願”
volition  n 意志力，決心（vol+ition）
Everything we do and everything we think is a product of our volition.
benevolent  a 善心的（bene好+vol+ent→好意的） /  benevolence  n
His benevolent nature prevented him from refusing any beggar who accosted him.
malevolent  a 惡意的（male壞+vol+ent→惡意的） /  malevolence  n
Her stare was malevolent, her mouth a thin line.
volunteer  n 志願者，志工  v 自願做（vol+unt+eer人→有意願的人→志願者）
Most of the relief work was done by volunteers.    
voluntary  a 志願的，自願的（volunt+ary）
She does a lot of voluntary work for the Red Cross.