disconsolate, a. inconsolable, [broken-hearted].
discontent, n. [dissatisfaction], discontentment. Antonyms: contentment, [satisfaction].
discontented, a. [dissatisfied], [restless], malcontent, disgruntled
discord, n. dissonance, discordance, inharmony, [variance], dissension. Antonyms: [harmony], [agreement], consonance
discordant, a. inharmonious, dissonant, jarring, unmelodious strident; [at variance], [contradictory], repugnant absonant.
discount, n. [deduction], [allowance], [rebate].
discourage, v. dishearten, dispirit, depress, [deter], [dampen], unnerve, [oppose], [dissuade].
discouragement, n. [depression], dejection; [opposition], [dissuasion], intimidation, determent, [damper], [obstacle], [difficulty], [barrier].
discouraging, a. depressing, disheartening, dissuasive.
discourse, n. [dissertation], [address], disquisition, [oration], [harangue], [speech].