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insufficient not enough in number, degree, amount, or quality; not sufficient.
insulate to cover, line, or surround with a material that reduces or stops the movement of heat, electricity, or sound.
insulation material used to insulate. [2 definitions]
insulin a hormone of the pancreas that controls and regulates the body's use of sugars and starches. [2 definitions]
insult to speak to or treat without respect or in a way that hurts feelings. [2 definitions]
insurance a protection against certain accidents that is provided by a company in return for payment of a fee. [2 definitions]
insure to guarantee against loss or harm with an insurance policy.
intact staying complete, whole, or without damage; not changed or harmed.
intake the place at which a liquid or gas is taken into something. [2 definitions]
in tears crying.
integer a positive or negative whole number or zero.
integrate to bring together and mix into a whole. [2 definitions]
integration the process of bringing all parts together into a whole. [2 definitions]
integrity a strong sense of honesty; firmness of moral character.
intellect the ability to reason and understand.
intellectual of or having to do with the intellect. [3 definitions]
intelligence the ability to learn, reason, and understand. [3 definitions]
intelligent having a great ability to reason and understand.
intelligible able to be easily understood; easy to comprehend.
intend to have in mind as something to do. [2 definitions]
intense having a very great degree of something, such as heat, or being in a very great degree or state. [2 definitions]