etymologies are the most important definitions

If a word means what it means, then, certainly, we are dealing with etymologies. At this time I am very interested in Jerusalem which is a city historically defined and protected by seven mountains, arranged in a sort of circle, with walls built at various tmes between these small mountains to furish protections to the inhabitants. The names of these small mountains are as follows: Gareb, Acra, Zion, Ophiel, Moriah, Bezetha, Goath (spellings may vary). I need to know what are the most ancient meanings for all these seven famous mountains - what is the basic-most meaning of these seven words?