blindfold

Concise Oxford English Dictionary © 2008 Oxford University Press:
blindfold/ˈblʌɪndfəʊld/

▶noun a piece of cloth tied around a person's head to cover the eyes. ▶verb deprive of sight with a blindfold. ▶adverb Brit. with a blindfold covering the eyes.

– origin C16: alt., by assoc. with fold1, of blindfeld, past part. of obs. blindfell ‘strike blind, blindfold’, from OE geblindfellan (see blind, fell2).