active：活动中的，积极的，主动的

词根词缀： -act-行动 + -ive形容词词尾,表性状

• invalidate
• invalidation
• invalidity
• invaluable
• invariable
• invariably
• invasion
• invasive
• invective
• inveigh
• inveigle
• invent
• invention
• inventive
• inventory
• inverse
• inversion
• invert
• invertebrate
• inverted snobbery
• invest
• investigate
• investigative
• investigator
• investiture