n.
1.
Dulness, obtuseness, insensibility, sottishness, blockishness, doltishness, senselessness, sluggishness of understanding, slowness of apprehension.
2.
Lifelessness, heaviness, insipidity, tameness, vapidness, want of interest, stupidness.
3.
Stupor, lethargy, torpor, stupefaction, morbid drowsiness, coma.