defence：防御，防卫，保卫；辩护，答辩；(复数)防御工事

词根词缀：de-离开 + -fenc-打击 + -e

• instigate
• instigation
• instigator
• instill
• instinct
• instinctive
• institute
• institution
• institutional
• institutionalize
• instruct
• instruction
• instructor
• instrument
• instrumental
• instrumentalist
• instrumentation
• insubordination
• insubstantial
• insufferable
• insufficient
• insular
• insularity
• insulate
• insulating