deucedly

"You know, Kaspar," said he, in conclusion, to the excited Almayer, "it is deucedly awkward to have a half-caste girl in the house.

1895, Joseph Conrad, Almayer's Folly

Now I come to think of it, the case grows deucedly clear.

1904, Edith Ferguson Black, A Beautiful Possibility

"Look above your head, Roger. Deucedly interesting, isn't it?" "Those insects, do you mean?"

1936, F.J. Thwaites, chapter XIV, in The Redemption, Sydney: H. John Edwards, published 1940, page 154

“My dearest Nadja, you must be deucedly cross with me for my subterfuge. But you have Gizmo at your side, if he has not expired or drowned in his own filth during the transatlantic crossing.”

2021 October 28, Sam Johnson & Stefani Robinson & Paul Simms & Lauren Wells, “The Portrait” (24:50 from the start), in What We Do in the Shadows, season 3, episode 10, spoken by Laszlo Cravensworth (Matt Berry)