indecent = not proper / (of behaviour) dirty & low)

indecorous = not according to good manners

indefatigable = (untiring)/not resting until one has obtained one’s purppose

indelible = not able to be rubbed out or cleaned of, (eg.indilible pencil)

indelicate = not such(a thing)as a nice polite person wouuld say or do

independent = not contolled by or depending on another / (self governing/free to live one’s own life & think one’s own thoughts/having enough money to live without working)

indeterminate = (un certain) / not fixed in time, place or meaning

indifferent = not interested in or not caring for / (without any very good or bad qualities, eg. An indifferent book)

impertinent = not polite,  not showing proper respect

indigenous = (born or produced in the country), not foreign

impervious = not allowing to pass through, (eg. Rubber is impervious to liquid / He is impervious to reason=cannot be made to understand)

indiscriminate = not choosing carefully

indoor(s) = (in the house),not in the open air

indubitable = not able to be doubted/(certain)

insubordinate = not obeying higher officers

insular = (of an island)/insular ideas=(narrow), not thinking of other nations

intractable = not easily controlled/(unwilling to obey)

intransigent = not willing to come to an agreement

involuntary = not under control of the will / (involuntarily=without meaning to do it)

invulnerable = not able to be wounded

irreffragable = not able to be proved untrue

irreparable = not able to be repaired

irresolute = not decided & so unable to act/(weak in character)

irrevocable = not able to be changed, eg.An irrevocable decision, (decision=act of deciding)

irresolute = not decided & so unable to act/(weak in character)