Language changes. Heard that, yo. Still, many good words get unfairly maligned, tarred or tarnished. Purposefully, as the American right and sometimes the left do for political purposes.
Others words just suffer bad fortune. They get used incorrectly, or suffer an unfortunate association with some event that fixes a new meaning onto them.
Tarnished words get dropped from usage. Then the language suffers because speakers must reach for less suitable words, invent new words, or simply communicate with less clarity, precision or meaning.
If the tarring of a word is political, that word is said only ironically, or sarcastically, with air quotes, or self-consciousness.
Here's my list of words that should be reclaimed. Words that have utility. Words that are worthy. Words we should use again without feeling funny. What words are on your list?