discretionary

adj.随意的,自由裁量的

discouraging, discouragingly, discourse, discourteous, discourteously, discourtesy, discover, discoverer, discovery, discredit, discreditable, discreditably, discreet, discreetly, discrepancy, discrepant, discrete, discretely, discreteness, discretion, discriminate, discriminating, discrimination, discriminatory, discursive, discursively, discursiveness, discus, discuss, discussion, disdain, disdainful, disdainfully, disease, diseased, disembark, disembarkation, disembodied, disembowel, disenchant,