dumbness

STUPIDITY
WordClue
TREKslow or difficult journey
LARGOvery slow tempo
MOTIONslow or harmonic
DUMBNESSstupidity
PLODDINGSlow, laborious progress
IMBECILITYidiocy
PINHEADdumbbell, dunce
BULLETdumdum or rubber