Vocabulary

non-inflammability; incombustibility

non-payment; default

boycott; buyer's strike

unexploded ordnance; unexploded shell; unexploded bomb; UXO

papal infallibility

bad reputation; poor reception; unpopularity; disrepute

slowness; inertness

less-than sign or greater-than sign (< or >); inequality sign

insubordination; disobedience

indivisibility

unwritten law; common law

indistinct; obscure

discontent and grumbling

invariance

idleness; lack of application; lazy study habits

illegal immigration

unlawful assembly

trespassing; intrusion

unlawful detention (of shipping); unlawful occupation (of a house or land)

illegal entry (into a country); illegal immigration

uncommon; outstanding

permanence; immortality

abstract number

nightless gay quarters; nightless city

indisposition; emperor's illness; unhappiness

disused article

space without columns

inseparability

nonnegotiable

degradation; downfall

juvenile delinquent

trouble-shooting; fault analysis

bad debts

insulator; nonconductor; poor conductor

indiscretion; bad idea; thoughtlessness; indiscreetness

(crime of) adultery

indisposition; sickness

unearned

unearned income; investment income; passive income

fountain of youth