詞根 nul,null = nothing 無(wú)
詞例:
1.null
adj.無(wú)效的;無(wú)意義的;無(wú)的;零
2.nullify [null 無(wú) +
v. 使無(wú)效;取消;使無(wú)意義;抵消
3.nullification [見(jiàn)上,-ation 名詞后綴 ]
n.無(wú)效;取消;作廢
4.nullity [見(jiàn)上,
n.無(wú)效;作廢;無(wú)
5.annul [an- = ad- =to + nul 無(wú) ]
v.取消;作廢
6.annulment [見(jiàn)上,-ment 后綴 ]
n.取消;廢止;無(wú)效