词根:ar = plow (犁地)
arable a. 可耕种的
词根:ar = dry (干)
arid a. 干旱的
arefavtion n. 弄干
词根:arbor = tree (树)
arboreous a. 树木的
arboriculture n. 种树业
词根:arch = chief (主要的)
architect n. 建筑师
archipei ago n 群岛
词根:arch = bear (熊)
arctic a. 北极的(在大熊星座下)
antarctic a. 南极的(ant相反+arctic)
词根:ard = burn (燃烧)
ardent a. 热情的
arson v. 纵火(ars=ard)
词根:ardu = difficult (困难)
arduous a. 劳累的
词根:aren = sand (沙)
arena 角斗场(以沙铺地)
词根:arom = apice n (香料)
aroma n. 芳香
aromatic a. 芳香的
词根:arter = pipe (管道)
artery n. 动脉