This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Present participle of vouchsafe.

"it behoveth us to thank God for that wherewith He hath favoured thee and us in vouchsafing us this blessed child of good omen, after despair and the cutting off of hope."

vouchsafed    vouchsafes    vouchsafing   

allow    grant   

vouchsafing    vouchesafement   

concede    bestow    condescend    deign    yield   

testability    roote    staie    lordliness    consisteth