Deficient
Part of speech: adjective
Definition: Lacking something essential; often construed with in. Insufficient or inadequate in amount.
Lacking
Part of speech: verb
Definition: To be without, to need, to require.
Example sentence: The second you think that all your good fortune is a product of your virtue, you become highly judgmental, lacking empathy, totally without self-awareness, arrogant, stupid - I mean, all the stuff that our ruling class is.