1.obs-

obscene obscenity obscura

 

2.ad-

advantage advocate advance

 

3.en-

enable enactment enamel

--en 變動詞用

 

4.--ant            

flight attendant,contestant,accountant,protestant,hydrant

 

5.--able

variable

 

6.hypo-- =under

hypothesis

 

7.alteration

the act or process of altering : the state of being altered

the result of altering : modification

party alteration 政黨輪替

8.ad- to, toward, near, in addition to, by

adjust [əˈdʒʌst]

verb

alter or regulate so as to achieve accuracy or conform to a standard

 

9.an- to, toward, near, in addition to, by

annihilate [əˈnaɪəˌleɪt]

verb

kill in large numbers;to destroy completely; extinguish

 

10.-ant Noun: an agent, something that performs the action

       Adjective: kind of agent, indication

disinfectant [ˌdɪsɪnˈfɛktənt]

noun

(Chemistry) an agent that destroys or inhibits the activity of microorganisms that cause disease

fragrant [ˈfreɪgrənt]

adj

having a pleasant or sweet smell