I字母开头的单词或词组(第23页)：
- insidious
- insinuate
- insipid
- insolence
- insolent
- insoluble
- insolvency
- insomnia
- insouciant
- inspection
- inspired
- inspiration
- install
- instantaneous
- instigate
- instate
- instill
- instinctive
- institutionalized
- instructive
- insufficient
- instrumental
- institute
- institution
- insubordinate
- instrumentalist
- insubstantial
- insular
- insularity
- insurgent
- insulate
- insulin
- intact
- insurrection
- intangibility
- intangible
- integral
- integrity
- intellect
- integrate
- intellectual
- intelligible
- intensify
- intent