This is the easiest way you can remove unnecessary words from your word cloud. Note that you should not add any coma, dot or such.
Download the Word Cloud visual from Microsoft Apps: https://appsource.microsoft.com/en-us...
Download Power BI Desktop (Free): https://powerbi.microsoft.com/en-us/d...
Download the text (.txt) that I used for analysis: https://drive.google.com/file/d/16rwS...
Good luck :)
Arghavan