| Subject | English | Russian |
| gen. | dumb thing | бессловесное существо |
| gen. | dumb thing | глупость (That was a really dumb thing to say. I was so embarrassed... ART Vancouver) |
| gen. | dumb thing | бессловесное животное |
| gen. | dumb things | глупости (Why do smart people do dumb things? ART Vancouver) |
| gen. | dumb things | бессловесные животные |
| gen. | dumb things | бессловесные твари |
| gen. | say some dumb things | говорить глупости (bbc.com Alex_Odeychuk) |