Undisciplined (ayukta), vulgar, stubborn, deceitful, malicious, lazy, Despondent, and procrastinating, the agent (kartā) is called of darkness (tāmasa).
An agent defined by dark inertia is undisciplined, vulgar, stubborn, fraudulent, dishonest, lazy, depressed, and slow to act.
(28) The agent, inept and vulgar, stiff-and-proud, a cheat, low-spoken, slothful, who is subject to depression, who procrastinates, is called [an agent] in Darkness' way.
18.28 The agent who is unsteady, naive, unbending, deceitful, wicked, [A variant reading is naikrtikah.-Tr.] lazy, morose and procrastinating is said to be possessed of tamas.
18.28 That doer is said to be Tamasika who is unqualified, unrefined, stubborn, depraved, dishonest, indolent, despondent and dilatory.
18.28 Unsteady, vulgar, unbending, cheating, malicious, lazy, desponding and procrastinating -- such an agent is called Tamasic.