Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
derring-do is a noun meaning "brave and heroic feats". It carries one recorded sense.
brave and heroic feats
Definitions, synonyms and semantic relations for derring-do come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.