Today I’ve gone with hearth, a word I’ve always hated because I think it should be pronounced like earth with an h in front not heart with a th on the end.
I get mad about weird things.
Hearth comes from the Old English heorð (the ð just means th), with the same meaning. It comes from the West Germanic hertho, burning place (don’t-make-joke-don’t-make-joke) and the Proto Indo European kerta, which comes from ker, meaning heat or fire. That ker gave us carbon of all words. I can’t even begin to explain what’s weird about that. But seriously? K to H? I’ve come across tons of letter switches, but that definitely makes the least amount of sense (and that includes the s/r thing from glare/glass).
Tony Jebson’s page on the Origins of Old English