Words that start with I

An introvert is a person who feels emotionally drained in social situations and enjoys spending time alone in order to feel energized.

Invisible means you cannot see something with your eyes.

People most often use it to describe something that is very well hidden, or for effort that people don't notice. For example, "she was invisible around the office".

The person in the middle of the picture is invisible.

Iowa, abbreviated to IA, is a state in the mid west of the United States of America. The capital of Iowa is Des Moines.

An iPod is a portable digital music player. iPods are made by Apple.

The iris is the colored part of your eye. The iris is a muscle that opens and closes the pupil in the center of your eye, controlling how much light reaches the inside of your eye.

Something is Irish if it relates to Ireland.

An iron is a device that is used for flattening out wrinkles in clothes. Irons have a handle at the top and a flat, smooth, metal bottom that is heated up. Once the bottom is hot it is rubbed over your clothes to smooth them out. Irons work better if the clothes are very slightly damp so many irons have a spray or steam feature.
Old fashioned irons were made of solid metal, and you put them in a fire to heat them up. Modern irons are heated by electricity.
Iron is also a type of metal.

An ironing board is like a small table with a padded top, especially designed to make it easy to iron clothes on. Most ironing boards have legs that fold up, so they can be stored away flat.

An island is a piece of dry land completely surrounded by sea. Some islands are very small, and are little more than a rock sticking out of the ocean. Some islands, like Australia, are very, very big.

Ivory is essentially teeth. Ivory usually refers to elephant's tusks, but any tooth large enough to be carved can be used as ivory. Before plastic was invented, ivory was commonly used for making ornaments, buttons, handles of knives and forks and the most familiar use - piano keys.
Today the trade in ivory is banned in most countries, and plastic or ivory substitutes are used where ivory was once used.