| A | B |
|---|
| derail | to run off or cause to run off the rails or tracks |
| efficiency | the ability to work without waste |
| era | a certain time in history |
| impossible | something that can't be done |
| uncomfortable | feeling or causing pain |
| misfortune | bad luck |
| preceded | came or happened before |
| transportation | a way of moving people and goods from one place to another |
| unbelievable | something that is hard to accept as true |
| incapable | not able to do (something) |
