originally (late 14c.) dorrying don,
lit. "daring to do," from durring
"daring," prp. of M.E. durren
"to dare" (see dare
) + don,
inf. of "to do." Misspelled derrynge do
1500s and mistaken for a noun by Spenser, who took it to mean "manhood and chevalrie;" picked up from him and passed on to Romantic poets as a pseudo-archaism by Sir Walter Scott.