un-词缀,表示反动作的词,需要8-10个如：unload -ful词缀,表示满满一把、一勺的词,8-10个如：fistful

unreal ,uncomfortable,unclear,unfriendly,unhappy,unequal,
unwelcome,unfortunate,unclean,uneconomic,unkind,unchangeable.
handful,houseful,armful,bagful,drawerful,cupful,mouthful,dishful,boxful,boatful,bellyful
useful,fruitful,hopeful,dreamful,peaceful,powerful,peaceful,changeful,shameful.un-词缀的需要像unload,uncover这样的动词unlock ,untie,unbutton,uncap,uncover,undo,undress,unhouse,uncageuntomb,unearth,unbosom