DictionaryRoot: in-
Latin
in-
not; without
Forms
- in-
- im- — Used before b, m, or p in Latin.
- il- — Used before l in Latin.
- ir- — Used before r in Latin.
Origin
Reconstructed Proto-Indo-European *n̥-, the unstressed negative form associated with *ne, ‘not.’
Note
Unrelated to the Latin in- meaning ‘in’ or ‘into,’ despite their matching forms.
7 / 253

adjective / noun
illegal
ih-LEE-guhl/ɪˈliːɡl/
Contrary to the requirements of law.
Etymology
Latin legalis described what pertained to law. With the negative prefix, illegal means contrary to law, not simply unrelated to legal matters.
Related word entries
- enemy
- entire
- entirety
- ignoble
- ignominious
- ignominy
- illegal
- illegitimate
- illicit
- illiterate
- immaculate
- immaterialNot relevant
- immaterialWithout physical substance
- immature
- immaturity
- immeasurable
- immediate
- immemorial
- immense
- immensity
- immobile
- immobility
- immoderate
- immodestRevealing the body
- immodestExcessive self-regard
- immodestyLack of humility
- immodestyIndecency
- immortal
- immortality
- immovable
- immune
- immunity
- immutability
- immutable
- impatience
- impatiens
- impatient
- impeccable
- impecunious
- impenetrable
- imperceptible
- imperfectFlawed or incomplete
- imperfectOngoing or habitual past action
- imperfection
- impermeable
- impersonal
- impertinenceRude boldness
- impertinenceLack of relevance
- impertinentIrrelevant
- impertinentDisrespectful
- impervious
- impious
- implacability
- implacable
- impolite
- importune
- impossible
- impotent
- impregnable
- improper
- improvisation
- improvise
- imprudence
- imprudent
- impudence
- impudent
- impunity
- impure
- impurity
- inaccessible
- inadequate
- inadvertence
- inanimate
- inarticulate
- inaudible
- incapable
- incapacity
- incessant
- inclement
- incognitoPrivate browsing
- incognitoConcealed identity
- incommunicado
- incomparable
- incompatible
- incompetent
- incomplete
- incomprehensible
- incongruity
- incongruous
- inconsiderate
- inconsideration
- inconsolable
- inconspicuous
- inconstant
- incontinent
- inconvenient
- incorporeal
- incorrect
- incorrigible
- incorruptibility
- incorruptible
- incredible
- incredulity
- incredulous
- incurable
- indecency
- indecent
- indecorous
- indefatigable
- indefinite
- indelible
- indemnity
- independence
- independent
- indeterminate
- indifference
- indifferentLack of interest or preference
- indifferentUnremarkable quality
- indigestible
- indigestion
- indignant
- indignation
- indignity
- indirect
- indiscreet
- indiscretion
- indispensable
- indisputable
- indissoluble
- indistinct
- individual
- indivisible
- indolence
- indolentAvoiding effort
- indolentMild medical course
- indomitable
- indubitable
- ineffable
- inefficiency
- inelegant
- ineluctable
- inept
- ineptitude
- inequality
- inert
- inertia
- inestimable
- inevitable
- inexcusable
- inexorable
- inexperience
- inexplicable
- infallibility
- infallible
- infamous
- infamy
- infancy
- infant
- infantile
- infertile
- infertility
- infidel
- infidelity
- infinite
- infinitesimal
- infinitive
- infinity
- infirm
- infirmary
- infirmity
- inflexible
- informal
- infrequent
- ingrate
- ingratitude
- inhospitable
- inhuman
- inhumane
- inhumanity
- inimical
- inimitable
- iniquity
- injurious
- injury
- injustice
- innocence
- innocent
- innocuous
- innumerable
- inopportune
- inordinate
- insane
- insanity
- insatiable
- inscrutable
- insecure
- insecurity
- insensate
- insensibleUnconscious
- insensibleImperceptible
- inseparable
- insincere
- insipid
- insolence
- insolent
- insolubleNot dissolvable
- insolubleNot solvable
- insolvent
- insomnia
- instability
- insubstantial
- insufficient
- insuperable
- insupportable
- intact
- intangible
- integer
- intemperance
- intemperate
- interminable
- intolerable
- intolerancePhysical sensitivity
- intoleranceRejection of differences
- intolerantUnaccepting of differences
- intolerantPhysical sensitivity
- intractable
- intransigence
- intransigent
- intransitive
- intrepid
- invalidLack of validity
- invalidPhysical weakness
- invariable
- invertebrate
- invincible
- inviolable
- inviolate
- invisibility
- invisible
- involuntary
- invulnerable
- irrationalNumber outside integer ratios
- irrationalWithout reason
- irrecoverable
- irrefutable
- irregular
- irregularity
- irreligious
- irreparable
- irresistible
- irreverence
- irreverent
- irrevocable