A puppy watching his owner leave for the day is an example of a puppy that would be described as forlorn.
Forlorn of all hope.
A forlorn acknowledgment of failure.
Origin of forlorn
- Middle English forloren past participle of forlesen to abandon from Old English forlēosan leu- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English forlorn, forloren, from Old English forloren (past participle of forlēosan (“to lose”)), from Proto-Germanic *fraluzanaz (“lost”), past participle of Proto-Germanic *fraleusaną (“to lose”), equivalent to for- + lorn. Cognate with Dutch verloren (“lost”), German verloren (“lost”), Swedish förlorad (“lost”). More at lese/leese, lorn.