downer

名词 downer:

1. a drug that reduces excitability and calms a person
   同义词：sedative, sedative drug, depressant

形容词 down:

1. being or moving lower in position or less in some value
   同义词：down
2. becoming progressively lower
   同义词：down
3. understood perfectly
   同义词：down, down pat, mastered
4. extending or moving from a higher to a lower place
   同义词：down, downward
5. being put out by a strikeout
   同义词：down
6. lower than previously
   同义词：depressed, down
7. shut
   同义词：down
8. not functioning (temporarily or permanently)
   同义词：down
9. low in spirits
   同义词：blue, depressed, dispirited, down, downcast, downhearted, down in the mouth, low, low-spirited

1. What a downer that guy is!
   那家伙多让人泄气呀！