Loth / loath

[AgentProvocateur]

I have it in my head that that one is "loth" to do something, but more and more I see it written as "loath". Is loth old fashioned, or was it never correct usage?

I think both are acceptable.

Not to be confused, of course, with loathe, which would be incorrect in that context.

Thanks. I'm sure it's only a matter of time before people start writing that they are loathe...