doldrums

n. （海洋上的）无风带，情绪低沉

doggerel, doggie (also doggy), 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, dole, doleful, 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,