People communicate ...

lan Trike is a short form of tricycle.

TV is short for television.

Something written or spoken is verbose if there are far more words used than is necessary to get the message across.

Vet is a shortened form of veterinarian.

lan A warning is something that tells you not to do something or go somewhere because it is dangerous.
Warning signs can be written or in pictures, so that people who can't read still know there is something to take caution of. Warnings are usually red or yellow.

A whiteboard is a smooth, white surface you can write on. Teachers use them to help explain things to their students, and people also use them to brainstorm ideas on.
You write on a whiteboard with a special kind of marker.

A word is a single unit of language that can be spoken or written. Every word has its own meaning or definition. A series of words put together in the right order make up a sentence.

Writing is words or music that have been put down on paper or into some other stored form, like on a computer. Writing is also a verb, the process of writing down something.

You yell when you shout loudly. People often yell out to get someone's attention, or because they are hurt.