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instinctive having to do with instinct. [2 definitions]
in stitches (informal) laughing out of control.
institute to bring into being or set in operation. [4 definitions]
institution an organization set up for a specific purpose, usually serving the public. Hospitals, churches, prisons, and schools can be institutions. [2 definitions]
in stock present for use or sale.
in store about to happen.
instruct to teach; educate; tell. [2 definitions]
instruction the act of giving knowledge; teaching. [2 definitions]
instructor one who teaches or instructs; a teacher.
instrument a tool or mechanical device used for special work. [2 definitions]
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.