Unit 1 despicable, despise, despotic, desultory, detach, detain, deter, deterioration, detour, detract
Unit 6 discrepancy, discrete, discretion, discretionary, discriminate, discursive, disdain, disengage, disgorge, disgruntle
Unit 5 discern, discharge, disciple, discombobulate, discomfit, discommode, discompose, disconcert, discord, discredit
Unit 3 diffuse, digress, dilapidate, dilate, dilatory, dilettante, diligent, dilute, diminish, disquisition
Unit 2 detritus, devoted, devout, dexterous, diabolic, diaphanous, diatribe, didactic, diehard, dovish
Unit 4 dingy, diocesan, diplomatic, dire, demography, disabuse, disaffected, disarm, disarray, disavow