from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. to place an item into pawn
- v. to pledge an item of value in return for a loan, or a trade for money
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To put in pawn; to pledge; to pawn.
from The Century Dictionary and Cyclopedia
- To put in pawn; pledge; deposit as security.
Sorry, no etymologies found.
Therefore take heed how you impawn our person, 
Osr. The king, sir, hath wager'd with him six Barbary horses: against the which he has impawn 'd, as I take it, six French rapiers and poniardi, with