Definition from Wiktionary, the free dictionary
deucedly (not comparable)
- (degree, informal) Quite; extremely
1895, Joseph Conrad, Almayer's Folly:
- "You know, Kaspar," said he, in conclusion, to the excited Almayer, "it is deucedly awkward to have a half-caste girl in the house.
1896, Arthur Conan Doyle, The Exploits Of Brigadier Gerard:
- Then you load them deucedly badly,' said Lord Wellington.
1904, Edith Ferguson Black, A Beautiful Possibility:
- Now I come to think of it, the case grows deucedly clear.