| Answer | Crossword Clue |
|---|---|
| vacuous | showing a lack of intelligence |
| unintelligent | Having or showing a low level of intelligence |
| intelligent | Having or showing intelligence, esp. of a high level |
| cleverest | (of a thing, action, or idea) Showing intelligence or skill; ingenious |
| cleverer | (of a thing, action, or idea) Showing intelligence or skill; ingenious |
| smartest | Having or showing a quick-witted intelligence |
