Words about words

Something is incomplete if it hasn't been finished yet.

A similar word to incomplete is unfinished. The opposite of incomplete is complete or finished.

Something is industrial if they are used for or by industry. This usually means heavy manufacturing or large scale production, like ore refining. Industrial objects are usually very big, heavy and dirty.
The opposite of industrial is domestic.

You ingest something when you take it into your body, usually by eating it. Ingest is a more technical term for eating, but can also include non-food items that you have ingested that aren't actually edible.

Injecting is a way of forcing a liquid inside something else. Medicines are often injected into people's vein using a syringe.
The person in the picture is injecting marinade under the skin of a chicken before cooking it.

Inquisitive is another word for curious. It means you are wanting to investigate and learn new things.

Something is intricate if it has many small parts, connected in a complicated way.
The carving in the picture is intricately done.

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.

Something is Irish if it relates to Ireland.

Something is Jewish if it relates to Judaism. It might also mean a Jew.

Being jolly is the feeling of being cheerful, joyful, festive, and happy. Christmas is often thought of as a jolly holiday. Santa Claus is often described as being a jolly person.