對於閱讀中碰到的生僻詞，我們首先要學會識別哪些情況下即使不瞭解詞義也不影響對短文的理解;其次是轉變對生僻詞義認識上的態度，即在許多情況下不必瞭解該詞的確切意義，尤其沒有必要了解它在英漢辭典中的中文釋義，而只需對該詞詞義的大概而籠統的理解就行。實踐中，在確定了短文中哪些生僻詞的詞義有必要作一大概瞭解後，我們可以從以下兩個角度來猜度詞義：
一、構詞知識
即利用單詞的構詞要素詞根，前後綴來識記單詞。詞根是一個單詞的根本部分，代表詞的`基本意義;前綴是加在詞根或單詞前面的部分，通常也有一定含義;後綴是加在詞根或單詞後面的部分，通常在增加詞義的同時還改變詞性。通過詞根詞綴構詞的方式有多種，現簡單歸納如下：
最後提分：英語專四閱讀過關技巧
①前綴+詞根：inter(中間)+vene→intervene(介入)
②詞根+後綴：circl(圓)+let(小)→circlet(小環)
③詞根+詞根：tele(遠)+scope(鏡)→telescope(望遠鏡)
④前綴+詞根+後綴：in(不)+aud(聽)+ible(可)→inaudible(聽不見)
⑤雙前綴+詞根：re(再)+dis(取下)+cover(蓋)→rediscover(再發現)
⑥詞根+雙後綴：care(用心)+less(不)+ly(地)→carelessly(不小心地)
⑦前綴+雙詞根：tri(三)+gono(角)+metry(測量)→trigonometry(三角幾何)
⑧雙詞根+後綴：biblio(書)+phil(愛)+ist(人)→bibliophilist(書籍愛好者)
⑨雙前綴+詞根+後綴：ir(不)+re(反對)+sist(站)+ible→irresistible(不可抵抗的)
⑩前綴+詞根+雙後綴：se(離)+greg(羣)+ation+ist→segregationist(種族隔離主義者)
雙前綴+詞根+雙後綴：un(不)+pre(先)+ced(走)+ent+ed→unprecedented(史無前例的)
二、上下文線索
利用上下文線索猜測詞義的方法很多，但其核心是尋找與該生僻詞相關的上下文意義線索，這些線索主要可歸納爲以下幾種：
(1)同義定義 爲了便於讀者理解作者本義，作者有時會對文中的生僻詞或專業性較強的詞直接給出定義。在下定義時，作者常使用一些信號詞， 如：is/are(called)，means，can be defined as，refer to，is/are known as，signify等，例：
Food fallacies refer to beliefs about food that are not true. 或標點符號，如——，()等，
例： Multiplexing ——transmitting independent signals at the same time in the same channel——increases the efficiency of radio channels.
有時，作者用同位語形式或連詞or給出定義，例：
Nerve cells evidently first appeared in coelenterates, “hollow gutted” organisms like hydra and the sea anemone.
Intelligent behavior remained impossible until the appearance of relatively big, complex types of brain——the types we find among the vertebrates, or backboned animals.
(2)近義複述 同一短文中上下毗鄰的句子通常有互釋作用，我們可以從上下文的複述中獲取與某一單詞相關的信息來猜度詞義。例：
Mr. and Mrs. Firth had a long courtship. They dated for nine years before they got married.
Although he often had the opportunity, Mr. Tritt never stole money from a customer. This would have endangered his position at the bank, and he did not want to jeopardize his future.
(3)反義對照 在表示對照的上下文中，常包含有意義相反的詞語或概念，這些意義相反的概念可以互爲線索，幫助我們猜度詞義。常有以下一些信號 詞：although，but，however，though，whereas，while，yet，on the contrary，on the other hand等。 例：Chimpanzees(猩猩) in the wild use simple objects as tools, but in laboratory situations they can use more sophisticated items.
Most dentists-offices are drab places, while Emilio’s new office is a bright, cheerful place.
(4)搭配集合 利用詞與詞的搭配或該詞所出現的語境，我們也能推知詞義的大概輪廓。例：
People gathered to look. Three fine streams of hot water sprouted from holes in the jacket(套，殼) of the radiator.
A man is watering his lawn just as an attractive, well dressed girl walked by. As he ogles her, he accidentally turns the hose on his ugly, dowdy wife.
(5)比較舉例 上下文中的比較和舉例，能揭示比較物或列舉物之間的共性，我們可根據這些共性來推知有關詞語的意思。例：
The consequences of epochal events such as wars and great scientific discoveries are not confined to a small geographical area.
Doctors believe that smoking cigarettes is detrimental to your health. They also regard drinking as harmful.
(6)因果時間 因與果、時間的先與後都是事物發展變化過程中的必然關係，在利用上下文推測詞義時，這些關係也至關重要。例：
Robert is considered peremptory administrator because he makes decisions without seeking the opinions of others.
When Mark was in pedantic mood, he assumed the manner of a famous professor and gave long lectures on boring, insignificant topics.
(7)常識 包括我們的生活經歷、經驗常識以及自己專業方面的知識，在閱讀到與自己專業相近的文章時，我們都會感到相對容易，這正是我們的專業知識在幫我們理解。例：
An apple falls down instead of up because of gravity.
An atomic clock is so precise that it can be used to check the accuracy of predictions based on Einstein’s relativity theories.
