I have found that super-productive days are usually followed by two and even three days when I can hardly write a word.
Many of the gender-variant male types were stigmatized; being regarded as women was hardly an elevation in social status.
They were so absorbed by the experience that they hardly noticed the extreme heat and difficult conditions.
c.1200, "in a hard manner, with great exertion or effort," from Old English heardlic "stern, severe, harsh; bold, warlike" (see hard + -ly (2)). Hence "assuredly, certainly" (early 14c.). Main modern sense of "barely, just" (1540s) reverses this, via the intermediate meaning "not easily, with trouble" (early 15c.). Formerly with superficial negative (not hardly).