Read this: The word slovo ("word") and the related slava ("fame") and slukh ("hearing") originate from the Proto-Indo-European root *klew- ("be spoken of, fame"), cognate with Ancient Greek (kles - "famous"), whence the name Pericles, and Latin clueo ("be called"), and English loud.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What Slavic word means "loud"?
unanswerable