12-Letter Words Starting with I

Infrequence

Infuriation

""Capability of being infused, pouredin, or instilled.""

Ingathering

In an inglorious manner; dishonorably; with shame; ignominiously; obscurely.

Ingratitude

Ingurgitate

Off-key in tune after family members start off

Inheritance

Plural or third person singular

Inheritrix

Affording no shelter

Difficult to live in

Harsh, inimical to life

""INHOSPITABLE Not hospitable; not disposed to show hospitality to strangers or guests; as, an inhospitable person or people. as, an inhospitable person or people.""

Acts of atrocious cruelty

In an iniquitous manner; unjustly; wickedly.

Innateness

Innervation

Innumeracy

Want or neglect of observance.

Jabs

""INOSCULATE To unite by apposition or contact, as two tubular vessels at their extremities; to anastomose.""

""The junction or connection of vessels, channels, or passages, so that their contents pass from one to the other; union by mouths or ducts; anastomosis; intercommunication; as, inosculation of veins, etc. as, inosculation of veins, etc.""

Inquisition

""Not salubrious or healthful; unwholesome; as, an insalubrious air or climate. as, an insalubrious air or climate.""

Insaneness

Lack of sanitation; careless or dangerous hygienic conditions.

Legends

INSECTICIDE An agent or preparation for destroying insects; an insect powder.

Insecticide

Change to services in exclusive diners

Insecurity.

Insecurity

INSEMINATE To sow; to impregnate.

Planting seeds in half the country

Inseminator

Insentience

Inseparable

Insightful

Insinuation

Insipidity

Insistency

Insobriety

""The quality or state of being insoluble or not dissolvable, as in a fluid.""

INSOLUBILIZE

Insolvency

Insouciance

Insouciant

Office of an examining officer

Body of assessors examine 'O' grade

Examining official's office

Inspiration

""INSPISSATE To thicken or bring to greater consistence, as fluids by evaporation.""

""The act or the process of inspissating, or thickening a fluid substance, as by evaporation; also, the state of being so thickened.""

Inspissator

Art exhibit in a gallery

The making of equipment ready for use

One 22 in country establishment

Installment

INSTANTIATE

Instantiate

""Restoration after decay, lapse, or dilapidation; renewal; repair; renovation; renaissance.""

Instigation

""The of instilling; also, that which is instilled.""

Instillment

Institution

Orders lessons (wordplay)

They're popular in IKEA manual

Something followed at school

A woman who instructs; a preceptress; a governess.

Piece of music without voices

Piece of music without vocals

Music with no vocals

Instrument

Word for a bore

Too much to bear

End of quip

""In a manner or to a degree beyond endurance; intolerably; as, a blaze insufferably bright; a person insufferably proud. as, a blaze insufferably bright; a person insufferably proud.""

In short supply

Not able to fulfil a need

Leaving something to be desired

INSUFFLATE To blow upon; to breath upon or into; to use insufflation upon.

The act of breathing on or into anything

Insufflator

Insularity

Abstract noun (-ity)

Insurgency

Rising from the ranks (wordplay)

Recruits in on planning for The Rising

Superior bishop fills in part 10

Intactness

Integration

Intensifier

Intensify

Intentness

Interactant

Interaction

Intercalate

High-climbing war planes

Interceptor

Saying of a prayer on another's behalf

Form of prayer ...

Act of pleading on behalf of another

Intercessor

""Pertaining to, of the nature of, or characterized by, intercession; interceding; as, intercessory prayer. as, intercessory prayer.""

Interchange

CLUSTER to form into groups

Altercations getting out of hand between New York and California, perhaps

Intercooler

Intercostal

Intercourse

Intercross

Meets

DEALERS dealer

Interdepend

Interdictor

DIFFUSE to spread widely or thinly

Interested

Interfacing

Interfusion

Intergrowth

INTERIORISE to incorporate within oneself; same as interiorize.interiorize.

Interiorise

Interiorize

Interjector

Interleukin

Interlinear

Interlining

Finds mate from another group creates a union in unfamiliar religious building

Intermeddle

Intermesh

Intermingle

Theatre's half-time

Break and bury embassy

Break Italian football team on purpose

Intermitter

Assimilated into one's nature by learning

Internalise

Takes to heart

Interneuron

Internuncio

Interpolate

U. N. workers.

PSYCHIC one sensitive to extrasensory phenomena

Interregnum

Interrelate

Interrobang

Grills

Conversation breakers.

Interruptor

Plural noun or verb form

(Of lines) crossing

Secant, for one

Urban-accident venue, often

Common urban accident venue

SEGMENT to divide into sections

SENSORY pertaining to the senses

SERVICE to {repair=v}

SESSION a period of time spent on any one activity

""SOCIETY an organized group, a fellowship, also SODALITY""

SPACING the distance between any two objects

SPECIES specie

SPERSED sperse

Intersperse

STADIAL a substance which depends on the life of a glacier

STATION to assign to a position

In deep space

Let star liner make such a voyage

Occurring between stars

STERILE incapable of producing offspring

English word

Sitting in the intervening spaces

Plural noun or verb form

Plural noun or verb form

Intertwist

Plural noun or verb form

They get asked lots of questions by job-hunters

They try to get opinions among TV audiences

""Mutually visible, or in sight, the one from the other, as stations.""

How to bellyache at home match with friend after batting

INTIMATE to {announce=v}

Bullies

Intolerance

Intranasal

Unlikely to budge

Renting isn't a problem if obstinate

Impervious to persuasion or reason

(Of verb) not taking a direct object

Neither here nor there I have to describe some verbs thus

Existing or taking place within the mind or psyche: intrapsychic conflict.

Arising or occurring within a species: intraspecific competition.

INTREPID {fearless=adj}

Insertion made in preface for religious outfit

Intromitter

Introspect

Torn revision (anagram)

Draft of a prologue (wordplay)

Withdrawal into oneself.

Directed inward; marked by interest in oneself or concerned with inner feelings. Contrasted with extroversive.extroversive.

Same as Intuitionalism. Intuitionalism.

Same as Intuitionalist. Intuitionalist.

""The act or process of swelling or enlarging; also, the state of being swollen; expansion; tumidity; especially, the swelling up of bodies under the action of heat.""

(Medicine / Pathology) (tr; usually passive) Pathol to turn or fold (an organ or a part) inwards; invaginate intussusceptive   adj

Invalidator

Invalidity

INVASIVE aggressive

Inventress

""INVESTIGATE To follow up step by step by patient inquiry or observation; to trace or track mentally; to search into; to inquire and examine into with care and accuracy; to find out by careful inquisition; as, to investigate the causes of natural phenomena. as, to investigate the causes of natural phenomena.""

What Brewster's committee does

One making a search or enquiries

One making a search or enquiry

Private eye

Investiture

Inveteracy

Invigilator

Invigorator

Non-appearance

Invitatory

Involvement

Inwardness

Ipecacuanha

Hot temper

Iridescence

Iridescent

Iridologist

""IRONICAL pertaining to irony, also IRONIC""

Irradiation

Irredentism

Irredentist

*No matter

Common malapropism used to mean "Nonetheless!"