uncumber

“A peck of oats was a favourite offering at her shrine in St. Paul's by those who wished for favours; and according to Sir Thomas More she owed her popular name because wives unhappy in their union so offered in the hope that she would _uncumber_ (_i. e._, disencumber) them of their husbands.”

Bell's Cathedrals: The Cathedral Church of Saint Paul An Account of the Old and New Buildings with a Short Historical Sketch

“Wylgeforte call her St. Uncumber, bycause they reken that for a pecke of otys she will not fayle to uncumber theym of theyr housbondys_. ”

Notes and Queries, Number 53, November 2, 1850