Quick answer
Knave means a dishonest man or rogue. In some card contexts, it can also refer to the jack.
Word page
A knave is a dishonest, untrustworthy, or roguish man. The word has an old storybook bite, and it also survives in card history as an older term connected with the jack.
Knave means a dishonest man or rogue. In some card contexts, it can also refer to the jack.
In plain English, a knave is a person you should not trust. The word sounds older and more theatrical than liar or scoundrel, so it gives a sentence a period flavor.
Knave is not common modern speech, but it is still understandable. It works best when you want a literary insult with old-world flavor. In plain modern writing, dishonest person, rogue, or scoundrel will usually be clearer.
| Similar word | Difference |
|---|---|
| rogue | Can be charming or independent as well as dishonest. |
| scoundrel | More morally severe and still easy to understand. |
| blackguard | More old-fashioned and villainous. |
| cad | Focused on ungentlemanly conduct. |
| varlet | Another archaic insult with servant or low-status history. |
| Opposite | Nuance |
|---|---|
| honest person | The plain moral contrast. |
| gentleman | A historical contrast in manners and status. |
| trusted friend | The opposite of someone suspected of betrayal. |
Knave is mainly a noun. Knavish means dishonest or roguish, and knavery means dishonest or roguish behavior.
Knave comes from Old English and originally had a broader sense connected with a boy or servant. Over time it developed the insulting sense of a dishonest or low man, and it also became linked with the jack in cards.
Use knave when old-world flavor is useful. Use rogue, scoundrel, or dishonest person when clarity matters more than theatrical tone.
You can also look up knave on these trusted language resources:
Edited by Absurd Words. Last updated: May 14, 2026. See the editorial policy for how definitions, examples, labels, and update checks are handled on the site.