ponderously

badly vigorously

severely

agonizingly arduously awkwardly burdensomely carefully cumbersomely cumbrously distressingly exhaustingly gruelingly hardly harshly inconveniently laboriously painfully roughly strenuously tiredly toilsomely unwieldily with great effort

easily

densely massively thickly

dejectedly dully gloomily profoundly sluggishly tediously wearily weightily

easily gently lightly