Old words in idioms

12 Old Words that Survived by Getting Fossilized in Idioms

English has changed a lot in the last several hundred years, and there are many words once used that we would no longer recognize today. There are some old words, however, that are nearly obsolete, but we still recognize because they were lucky enough to get stuck in set phrases that have lasted across the centuries.

mentalfloss.com

Hi, I'm new to TIL. I rather liked this on the etymology of odd words in idiomatic phrases like 'hue and cry' and 'kith and kin'.

Can we have a tag for language, please?