I字母开头的单词或词组(第25页)：
- invective
- inundate
- inured
- invade
- inveigh
- inveigle
- inventory
- inverse
- invert
- invertebrate
- investigate
- inveterate
- invigorating
- invidious
- inviolable
- invigorate
- invoke
- involuntary
- iodine
- iota
- invulnerable
- irascible
- ire
- irate
- iridescent
- irk
- irksome
- ironclad
- ironic
- irony
- irradicable
- irreconcilable
- irredeemable
- irreducible
- irrepressible
- irrevocable
- irremediable
- irritable
- irrigate
- irritate
- irritation
- isolate
- isotope
- issue