digression

n. 离题，枝节话

dig in, dig out, dig up, digest, digestibility, digestible, digestion, digestive, digestive biscuit (also digestive), digestive system, digger, digging, digit, digital, dignified, dignify, dignitary, dignity, digraph, digress, digressive, digs, dike, dike (also dyke), diktat, dilapidate, dilapidated, dilapidation, dilate, dilated, dilation, dilatorily, dilatoriness, dilatory, dilemma, dilettante, dilettantish, dilettantism, diligence, diligent,