doleful

adj. 忧愁的，消沉的

doggo, doggone, doggone (also doggoned), doghouse, dogie, dogma, dogmatic, dogmatically, dogmatism, dogmatist, dogmatize, dogmatise, dogrose, dogsbody, dogwood, doh (also do), doily (also doyley, doyly), doings, dol, doldrums, dole, dolefully, dolefulness, doll, doll's house, dollar, dollop, dolly, dolly-bird (also dolly), dolmen, dolorous, dolour (US dolor), dolphin, dolt, doltish, domain, dome, domed, Domesday Book, domestic, domestic science,