Harangued: lectured, or in more amusing language, delivered "a bombastic, ranting speech or verbal attack"
SH-V use: "The boys were harangued by a man in a full beard."
Random Google Find: "Nicole Kidman Harangued by Unruly Facebookers" (an article title)
Lugubriously: mournfully or dismally, especially in an exaggerated manner
SH-V use: "As Trout lugubriously slung the bag from his shoulder, Billy Pilgrim approached him."
Random Google Find: "Speaking lugubriously, he sounded like he should have been at a funeral rather than a wedding."
(I found this after I saw a link for the word on "a social network for people who love words." It's called Wordie, and it's "Like Flickr, but without the photos." So it says.)
And another note relating to Trout: he told Maggie White that he is afraid of Doberman pinschers. Dogs seem to be a motif in the book, and Princess was noticeably a German Shepherd. Wikipedia says the Doberman breed also originated in Germany. Whether Vonnegut was intending anything with this connection, I don't know.