Prefix in-

Meaning ‘into’, ‘in’, ‘on’, ‘upon’

The final sound of this prefix often changes (assimilates) to match the beginning sound of the base/word.

in-	im-	il-	ir-
inbound inborn inbred incest incident incisor incite incline include income increase incubate incur incursion indebted indeed indent index indict indoor induce induct inlay inlet infarct infatuate infect infer infest infield infight infix inflame inflate inflect inflict influence influx inform infringe infuriate infuse ingenious ingenuous ingest ingress ingroup ingrown inhabit inhale inherent inherit inhibit initial inject inland inmate innate inning innovate innuendo inpatient input inquest inquire inroads insect insert inside instal (US install) inset insidious insight insignia insinuate insist insole inspect inspire instant instead instep instil instinct institute instruct instrument insult insure insurgent intake intend intern intimate intone intoxicate intrigue intrude intuit inundate invade invent inverse invert invest invite invoice invoke involve inward	imbibe immerse imminent immolate impact impair impale impart impeach impede impel impend imperil impetus implant implicit implode implore imply impose import important impound impress imprison impulse impute	illusion illustrate illustrious	irradiate irrigate irrupt

Spelfabet