| Answer | Crossword Clue |
|---|---|
| HUM | Run smoothly, as a machine |
| OPERATE | Run, as a machine |
| HUM | Run smoothly, as an engine |
| PURR | Run smoothly, as an engine |
| SWIPE | Run through a credit card machine |
| STROKED | Hit smoothly, as a ball |
| ROPY | Not pouring smoothly, as a liquid |
