List 26-30 not mastered

Ingenue

Innocent young girl or actress

Ingenuous

Innocent, trusting, naïve

Ingrate

Ungrateful person

Ingratiate

Gain approval by doing things to make them like you

Inherent

Natural, permanent

Inimical

Harmful, hostile

Inimitable

Not able to be imitated

Iniquitous

Wicked, immoral

Injurious

Causing harm to something

Inkling

Faint idea or hint

Innate

Existing in a person since birth, rather than learned

Innocuous

Harmless

Innuendo

Hint, suggest

Inopportune

Happening at a bad time

Inordinate

Excessive, beyond normal limits

Inquisitor

Harsh questioner

Insalubrious

Unhealthy, unpleasant

Insatiable

Not able to satisfy

Inscrutable

Impossible to understand

Insensible

Unaware, unable to feel

Insidious

Sneaky, causing secret harm

Insinuate

Hint, suggest

Insipid

Lacking in flavor, dull

Insolence

Rude and disrespectful behavior

Insolvent

Bankrupt

Instigate

Start/cause something to happen

Insubordination

Disobedient

Insubstantial

Insignificant, lacking real value

Insularity

Narrow-minded

Insuperable

Impossible to overcome

Insurgent

Rebellious

Insurmountable

Impossible to overcome

Insurrection

Rebellious

Intangible

Can't be touched, abstract

Intelligentsia

Intellectual elite of society

Intemperate

Lacking self-control in extreme behavior

Inter

Bury a dead body

Interim

Meantime, temporary period between two events

Interloper

Unwanted intruder

Interment

Bury a dead body

Interminable

Endless

Intimate (v)

Hint, suggest

Intractable

Stubborn, hard to control

Intransigence

Refuse to compromise, stubborn

Intrepid

Fearless, brave, bold

Intrinsic

Belonging naturally to something

Coming from inside rather than from external factors

Introspective

Examining your own thoughts and feelings, reflective

Inundate

Overwhelm, flood with too many things

Inured

Accustomed, hardened by exposure to something unpleasant

Invective

Abusive language

Invidious

Unpleasant, likely to cause bad feelings

Invigorate

Give life, energy to someone or something

Inviolable

Something impossible to harm

Invocation

Calling upon god for guidance/help

Invoke

Ask for help

Invulnerable

Something impossible to harm

Iota

Small amount

Irascible

Irritable, easily angered

Irate

Anger

Ire

Anger

Iridescent

Exhibiting rainbow like colors

Irksome

Annoying, tedious

Irreconcilable

Impossible to bring into agreement, incompatible

Irrefutable

Indisputable, undeniable

Irremediable

Incurable

Irreparable

Not able to be repaired

Irrepressible

Impossible to control or restrain

Irreproachable

Impeccable, faultless

Irresolute

Feeling hesitation, uncertainty

Irretrievable

Not able to recover or regain

Irreverence

Lack of respect for things people take seriously

Irrevocable

Impossible to chance, reverse, or undone

Itinerant

Traveling from place to place

Itinerary

Travel plan

Jabber

Talk fast and unclear

Jaded

Tired because you experienced too much of something

Jargon

Language used by a special group

Jaundiced

Biased point of view

Jaunt

Short fun trip

Jaunty

Lively, cheerful

Jettison

Throw or someone off a moving airplane or ship

Get rid of bad idea or plan

Jingoist

Extreme patriotism, believe their country is superior to others

Jocose

Joking

Jocular

Joking

Jollity

Lively, cheerful

Jostle

Bump or shove

Jovial

Friendly, cheerful

Jubilation

Feeling joy after major success

Judicious

Showing good judgement

Juncture

Event that occurs at a critical time

Place where things join

Junta

Government run by small group

Jurisprudence

Study of law

Kernel

Essential part of an idea, core

Killjoy

Person who ruins fun

Kindle

Start a fire, inspire

Kindred

Family, relatives

Similar in nature and character

Knave

Dishonest person

Knit

Joining things together

Knoll

Small round hill

Knotty

Full of knots, complicated