down

v. 使掉落 She tipped the dirty water down the drain. n. 羽绒； down jacket 羽绒服 PREP To go ~ something such as a slope or a pipe means to go toward the ground or to a lower level. PHRASAL VERB come down with something: to get an illness that is not very serious; I am coming down with a cold. I keep sneezing, and I have a runny nose;

v. 使掉落

• She tipped the dirty water down the drain.

• feeling down? Is it a weekend? Go to your local dog park and sit down. Dogs tend to swarm to new sitting humans.
  up

• go down