Which word contains the word root that means believe

The word root that means believe is "cred." This is "believe" in Latin. This word root is used in several common words nowadays. For example, the words "credo" and "creed" refer to a statement of belief. On the other hand, words such as "credible," "incredible," "credibility," "credit" and "credentials" all use this word root and are all related to the concept of "believe."

yes, they are. i think.

greet them:

buenas noches.

that is considered night time which is when "good night" is used.