Was with Kiel, one of my PhD students the other day, reading a draft chapter of his PhD thesis. He used the word ‘thusly’ and at first I thought this was a Kiel-ism (sorry Kiel, you do have a few). However, he assured me it was common usage … and not just for him. I suspected it was a regional idiom and indeed a bit of web searching finds many archaic uses of thusly, but several more recent Lancashire uses.
I suspect the word arose because ‘thus’ often precedes a verb and so has acquired an adverb ‘-ly’ ending … a form of lexical over-generalisation. … and if you have not already stopped reading because you can’t understand why anyone would be even interested in this level of language … as I did the web search found a lovely discussion site called INTERACTION (and no, this one is not the synonymous BCS HCI Group) where one person mildly mocked another for using ‘thusly’ in the 21st Century … obviously not a Lancashire lad.
This has also made me reflect on my own frequent use of ‘thus’ to mean ‘therefore’ as opposed to ‘in this way’ … argh am I really a grammar nerd :-/