The following video by Dr. Brian Russell illustrates how to do an original biblical language word study. Note that we always study the original Greek, Hebrew, or Aramaic words behind the English word. It’s inappropriate to study the English word, except just to know what it is for your speaking and reading of English.
Dr. Russell shows you how to do a Word Study using BlueleterBible.org.
You can do the same thing using Biblehub.com (which I use more frequently). I will do a video on how to use Biblehub.com for that soon.
You can also do word studies using Bible Software like Logos.com
