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insufficiency
Lack of necessary amount or quality.
insufficient
not enough; lacking in quantity or quality.
insufficiently
Not enough or inadequate.
insular
Isolated or detached from others.
insulate
To protect from heat, cold, or electricity.
insulation
Material that reduces heat loss or sound.
insulator
a material that prevents electricity or heat flow.
insulin
Hormone that regulates blood sugar levels in the body.
insult
A disrespectful remark or action.
insult one's intelligence
to offend someone's smartness or understanding
insurance
A contract to protect against financial loss.
insure
to make certain or secure
insurer
A company that provides insurance coverage.
insurgency
A rebellion against an established authority.
insurgent
A rebel or revolutionary member.
insurmountable
Too great to be overcome.
insurrection
A violent uprising against authority.
intact
Not damaged or altered; whole.
intake
entry point for air or substances
intangible
Cannot be touched or physically measured.
integer
A whole number, positive or negative.
integral
whole number without fractions
integrate
to combine different parts into a whole
integration
racial or social inclusion in society