I really have no idea what we are supposed to discuss here. It seems what you want to know is something like this:
Iike one case, the open syllable "flu". F implys a "rub face touch "(two things are familiar with each other)meaning,and l implys a "one after one continuous"meaning.So alots of meanings occur from the basic and single letter meanings.
That was your example. Well, I have never heard letters or sounds had any specific meanings. Where did you get that info from? You claimed you know the meaning of consonants, and you want to know the meaning of vowels now, but how did you learn what you know so far? Where? If we manage to get a better global picture of the problem, I believe we will be able to understand you better.