infidelity
Unfaithfulness in a marriage or an intimate (sexual or romantic) relationship: practice or instance of having a sexual or romantic affair with someone other than one's spouse, without the consent of the spouse.
Unfaithfulness in some other moral obligation.
Lack of religious belief.

inflatable
Able to be inflated or blown up.

inflatables
plural of inflatable

infomax
A particular optimization method, prescribing that a function that maps a set of inputs to a set of outputs should maximize the average mutual information between the two sets, subject to constraints.

infotaxis
Any searching strategy in which there is sparse information, especially a strategy used by biological organisms to zigzag towards the source of an odour based on sporadic clues.

infraclasses
plural of infraclass

infrafamilies
plural of infrafamily

infrafamily
A rank below subfamily

infrarostral
Beneath a rostrum

infrarostrals
plural of infrarostral

ingrain
To dye with a fast or lasting colour.
To make (something) deeply part of something else.

ingrains
third-person singular simple present indicative of ingrain

inkslinger
A careless or unskilful writer.

inkslingers
plural of inkslinger

inquisitorships
plural of inquisitorship

inrigger
A rowing boat that has oarlocks positioned on the gunwales

inriggers
plural of inrigger

insectothopter
A miniature unmanned aerial vehicle designed to look like a dragonfly, developed by the CIA in the 1970s.

insectothopters
plural of insectothopter.

inservice
in-service training

inservices
plural of inservice

inshipment
A shipment inward; an import.

inshipments
plural of inshipment

insight
A sight or view of the interior of anything; a deep inspection or view; introspection; frequently used with into.
Power of acute observation and deduction
Knowledge (usually derived from consumer understanding) that a company applies in order to make a product or brand perform better and be more appealing to customers
Intuitive apprehension of the inner nature of a thing or things; intuition.
An extended understanding of a subject resulting from identification of relationships and behaviors within a model, context, or scenario.
An individual's awareness of the nature and severity of one's mental illness.

insights
plural of insight

inspectorships
plural of inspectorship

instadad
Alternative form of insta-dad.

instadads
plural of instadad

instamom
Alternative form of insta-mom.

instamoms
plural of instamom

instructorships
plural of instructorship

inswinger
Alternative form of in-swinger.

inswingers
plural of inswinger

intendantships
plural of intendantship

intercepter
Alternative form of interceptor.

intercepters
plural of intercepter

interceptor
Anyone or anything that intercepts something else.
A combat aircraft designed to intercept and destroy enemy aircraft before they can attack.
A guided missile designed to intercept and destroy enemy missiles.
A device to trap, remove, or separate hazardous or undesirable matter (such as oil or sand) from normal waste conveyed through it, permitting normal sewage or liquid wastes to discharge into the disposal terminal by gravity.
A hook routine that intercepts normal program flow to carry out a task.
A sewer that intercepts sewerage destined for an outfall (e.g. into a river) and redirects it to a treatment plant.

interceptors
plural of interceptor

intercostal
Between the ribs of an animal or person.
Between the ribs of a boat.

intercostals
plural of intercostal

intercrossings
plural of intercrossing

interdictor
An aircraft designed to bomb enemy supply operations.

interdictors
plural of interdictor

interlinings
plural of interlining

interlinkage
linkage together

interlinkages
plural of interlinkage

interlockings
plural of interlocking

intermediate
Being between two extremes, or in the middle of a range.

intermediates
plural of intermediate

intermodal
Relating to more than one mode of transport.

intermodals
plural of intermodal

internships
plural of internship

internuncioships
plural of internuncioship

interordination
A reciprocal relationship between two terms

interordinations
plural of interordination

interownership
The ownership of a resource by multiple parties.

interplay
Interaction; reciprocal relationship.

interplays
plural of interplay

interpreterships
plural of interpretership

interregna
plural of interregnum

interregnum
A period of time between the end of one monarch's reign and the accession of their successor.
A break in continuity; a gap, an intermission.
A period of time between when a minister or pastor leaves a church and when a new one is installed.
A period of time between the end of one political leader's term and the start of the term of their successor; a period of time during which normal executive leadership is interrupted or suspended, and a polity is either left without leadership or has only a temporary one.
A temporary exercise of authority or rule during a period of time when there is no monarch or political leader.

interregnums
plural of interregnum

interrelationship
Between multiple relationships; interrelation

interrelationships
plural of interrelationship

interurban
Of, pertaining to, involving or joining two or more urban centres.

interurbans
plural of interurban

intimacies
plural of intimacy

intimacy
Feeling or atmosphere of closeness and openness towards someone else, often but not necessarily involving sexuality.
Intimate relationship.
Intimate detail, (item of) intimate information.

intimatopia
A fantasy world that serves as an ideal setting for sexually charged relationships involving a high degree of sustained emotional intimacy.

intimatopias
plural of intimatopia

intimin
An adhesin of certain strains of E. coli.

intimins
plural of intimin

intrarelationship
Within a relationship.

intrarelationships
plural of intrarelationship

inventorships
plural of inventorship

investorships
plural of investorship

ionocraft
An aircraft propelled by electrohydrodynamic propulsion.

ionocrafts
plural of ionocraft

ionocyte
A specialized epithelial cell, involved in the maintenance of osmotic homeostasis, that has many ion transporters

ionocytes
plural of ionocyte

ipocras
Obsolete form of hippocras.

ironclad
Covered with iron, steel, or (loosely) any other tough metal; armor-plated.
Solid or certain; not able to be disputed or questioned; irrefutable.
Rigorous; severe; exacting.
Stubborn; inflexible.

ironclads
plural of ironclad

irrelationship
Quality of irrelation; lack of relationship.

irrelationships
plural of irrelationship

irrelevance
Lack of relationship with the topic at hand; lack of importance.

irrelevances
plural of irrelevance

isle
An island, usually very small. Compare with islet.

isles
plural of isle

isoboundaries
plural of isoboundary

isoboundary
An isoelectric boundary (between positive and negative charges)

isoclasses
plural of isoclass

isodapane
An isoline joining points on a map with the same total transport costs.

isodapanes
plural of isodapane

isodrome
A method of moving a fleet from one formation to another, the direction usually being changed eight points, by means of paths of equal length for each ship.

isodromes
plural of isodrome

isofemale
Originating from a single wild female

isofemales
plural of isofemale

isoglutamine
A gamma amino acid derived from glutamic acid by substituting the carboxyl group in position 1 with an amide group.

isoglutamines
plural of isoglutamine

isolanid
lanatoside C, a cardiac glycoside

isolationships
plural of isolationship

isooxazoline
Synonym of isoxazoline.

isooxazolines
plural of isooxazoline

isopolities
plural of isopolity

isopolity
Equal rights of citizenship in different communities; mutual political rights.

isorenieratene
The carotenoid 3,3′-((1E,3E,5E,7E,9E,11E,13E,15E,17E)-3,7,12,16-tetramethyloctadeca-1,3,5,7,9,11,13,15,17-nonaene-1,18-diyl)bis(1,2,4-trimethylbenzene)