unassv.
Origin: Formed within English, by derivation. Etymons: un- prefix2, ass n.1
Etymology: < un- prefix2 + ass n.1Previous versions of the OED give the stress as: unˈass.
1654 E. Gayton iv. iii. 184 Gines Passamont..With Sancho's Asse unto a Fare was packing; The quick-eyed Bore had spied him, and unass'd him.
This entry has not yet been fully updated (first published 1921; most recently modified version published online March 2021).