Words are the main element of verbal communication. The words we use depend on our vocabulary, experience, personal understanding of the world. For example, the word “dangerous” would mean one thing to a person that likes driving racing cars and climbing high mountains, but completely another thing to a person who tries to avoid all possible risks.
We must be very careful in choosing our words and sentences, communication structures. The language we use must be understandable for our communication partner. Words that are not familiar should not be used, or they should be explained first. Jargon (even professional) should be avoided. Shorter sentences should be used, especially in verbal (not written) communication. The longer the sentence is, the bigger are the chances to misunderstand it.