Making a sentence

It has dawned on me that it is not easy to make a complete sentente. A complete sentence is a complete idea. I have discovered that even at my level, if you dont know the 'word linkages', you are unable to string a sentence.

For example - the word 'fundamental' in the quote by Stephen Covey

Can you guess what is the meaning of fundamental? 

Yes, it is not easy to guess the meaning of this word.

Next, you must refer to the dictionary. Can you manage to guess the meaning? A dictionary will have definition 1, definition 2, definition 3 and so on. So, context is important to guess the meaning of the word.