from The Century Dictionary.
- noun The state of being spleenish.
Sorry, no etymologies found.
Now anger is by nature at the farthest distance imaginable from complacency, and spleenishness from placidness, and animosity and turbulence from humanity and kindness.
Perchance, if he were not too far sunk in his spleenishness, he could lift words from Gabriel Harvey and confess, "I was never so splenetique when I was most dumpish but I could smile at a frise jest."