'Generous' can be used to describe an amount of credit-given or leniency. When used in this way, what is the counterpart word that would imply a lack of leniency? The closest word I have is 'austere', but I'm not convinced 'austerely' is a word.
The phrase that sparked this was:
"... tells us the nature of humanity is, generously, rebellion or, ____ly, malice".
I was trying to illustrate my point and that was the phrase that came out; I stumbled over the blank space. We checked Thesaurus.com and Merriam-Webster with the best suggestions being 'parsimoniously' or 'miserly', but both have monetary connotations.