unsours

Verb

unsour (third-person singular simple present unsours, present participle unsouring, simple past and past participle unsoured)

1. (transitive) To remove the sourness from; to make no longer sour.
   • He'd worked in the dairy industry for thirty-one years, recalling how in the past, when regulations were less stringent, they'd worked out how to unsour old cream, which they made into butter for domestic consumption.2005, Caroline Swain, Upon That Fish: A Portrait of New Zealand in 292 Lifts, page 220