1: ann=year

annals         

annalist

annual ~ annuity

biannual ~ seminnual

centennial (cent=100)分

2：audi = hear

auditorium

audible ~inaudible

audio-video

audit~auditor

3:ag=do

subagent

agential

agency

agenda

4:agri=field

agriculture

agrimotor~tractor

agrarian        agrarian form

agronomy

5:alt=high

altar          exalt ~exaltation   

altimeter     

alto

6:alter/ali=other          alter改变

alter ego 

alternative

alternate

alien

alias

7:am=love          amateur

amiable

amicable

amour ~ amorous            paramour

8:art=skill

artist    artistic

artifact    artificial        artisan

9:aug=increase

auction拍卖  auctioneer

augment            august 威严的