The Hebrew root has 3 consonants usually. We now come to the central theme of all word building in Hebrew; it is the central rhythm of the whole vast far flung structure of the Hebrew language. Practically all words in Hebrew go back to a root and this root must have in it 3 consonants. You can do anything you want to the root, you can use it in any verb form or tense, you can turn it to nouns, adverbs, prepositions, adjectives. No matter what you do you will see always staring you in the face? The 3 constants of the root, you can never escape them and equally important, what you do with the root, no matter in to what word you turn it, that word must carry in it something of the meaning of the root.