derring-do

[ der-ing-doo ]
/ ˈdɛr ɪŋˈdu /

noun

daring deeds; heroic daring.

Origin of derring-do

1325–75; Middle English durring-do literally, daring to do, erroneously taken as noun phrase. See dare, do1
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British Dictionary definitions for derring-do

derring-do

/ (ˈdɛrɪŋˈduː) /

noun

archaic, or literary a daring spirit or deed; boldness or bold action

Word Origin for derring-do

C16: from Middle English durring don daring to do, from durren to dare + don to do
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012