If you want to incorporate elements of some cultural tradition, have the respect and personal integrity to go to the source wherever possible - and have the respect to have properly researched your own traditions first. The source rarely lives in an expensive California retreat, nor does it commonly publish through Llewellyn. If we truly can't go directly to the original source, it's our responsibility to research as much as we can from as many secondary sources as we can, and to be open to corrections and new angles or information from others who've done their homework. He's talking about what the word means, what it means within the belief system that coined the word. On to 'semantics'.
Words have power.
Words are powerful. Words have meaning. Words are meaningful. Sloppy, careless usage diminishes the usefulness of words for their intended purpose - communication . Effective communication relies on words having specific, commonly accepted definitions.