This is about Hebrew language, shorashim (verb roots) and their application in various conjugations, Hebrew: binyanim. Just click on an entry to see what is meant.
If all this is Greek to you, then have a look at the Hebrew course on this website.
This site lists the varying meanings of verbs deriving from one and the same root and as a supplement to give you a general vocabulary showing words derived from each root. The idea is not to show an exhaustive directory, but a practcal help acquire a useful vocabulary. How to form a noun out of every verb, is described in the Hebrew course, lesson 14c.