I字母开头的单词或词组(第21页)：
- indulge
- induction
- induct
- indolent
- induce
- indubitable
- indoctrinate
- individual
- indispensability
- inelasticity
- infinity
- inflamed
- inflame
- infinitesimal
- inferno
- infiltrate
- infest
- inferior
- infer
- infelicitous
- infection
- infantry
- infatuation
- infant
- infantile
- inexplicable
- infirm
- inexorable
- infelicity
- inexhaustible
- informed
- influx
- inflammation
- inflict
- inflate
- infraction
- infuriate
- infringe
- infuse
- ingenious
- ingenuity
- ingenuous
- ingest
- ingrained