a.
1.
Lifeless, breathless, extinct, dead.
2.
Dejected, depressed, discouraged, dispirited, low-spirited.
3.
Dull, torpid, sluggish, cold, apathetic, phlegmatic, languid, soulless, feeble, unenterprising.
4.
Heavy, stupid, dull, frigid, tame, prosaic, prosy, insipid, uninteresting.