Spire is a play on the Latin "spirant" which means "to breathe" and is the root of the word "respiration" as well as "spirit". It is also the root of "inspiration" and "aspire", which all come from the same root.
In many diverse cultures around the world, the word "breath" and "spirit"/"life energy" are the same word.
In many diverse cultures around the world, the word "breath" and "spirit"/"life energy" are the same word.