doubtless

ad.肯定地；无疑地

double-dealing, double-decker, double-dyed, double-edged, double-faced, double-glaze, double-glazing, double-jointed, double-park, double-quick, double-stop, double-talk, double-think, doublet, doubly, doubt, doubter, doubtful, doubtfully, doubting Thomas, douche, dough, doughnut, doughty, doughy, dour, dourly, douse, douse (also dowse), dove, dovecote, Dover, dovetail, dowager, dowdily, dowdiness, dowdy, dowel, down, down draught (US down draft),