How to do a search for a specific word that is inside and email

Clarifying to read I need to know how to do a search for a specific word that I know is in an email in my inbox.

Search should already find a word within the body text of an email.

To search, press the magnifying glass in the toolbar and enter the word.

After the initial search, the magnifying glass icon changes. Press this icon to search the server. You can also press the three dot menu and select "Search everywhere".

Where so you expect the word to be found, within the email address to/from fields, subject, email body?