GMAT Vocabulary Flash Cards @ englishpdf.com and englishteststore.com File 159 debauchery (n) indulgence in one's appetites debilitate (v) to enfeeble; to wear out debonair (adj) Having gentle or courteous bearing or manner debut (n) A first appearance in society or on the stage decadence (n) a decline in morals or art decagon (n) A figure with ten sides and ten angles decagram (n) A weight of 10 grams decaliter (n) A liquid and dry measure of 10 liters