Linguistic shifts and poisoned words

The meaning of words, so the etymologists tell us, can be changed through the centuries by fashion, foreign influences, and carelessness. English is especially vulnerable to mutations that can enrich the vocabulary and sometimes infuriate. To flirt in the 1600s was to make an unexpected sharp movement. Nice began as a negative description of an idiot, stance described an ungainly position.

But what has happened to the excellent Greek import, phobia, which until now has meant fear, rational or otherwise, of, for example, snakes, spiders, heights, confined spaces, flying, and dentistry?