vouchsafe
Concise Oxford English Dictionary © 2008 Oxford University Press:
vouchsafe/vaʊtʃˈseɪf/
▶verb give, grant, or disclose in a gracious or condescending manner.
– origin ME: orig. as the phr. vouch something safe on someone, i.e. ‘warrant the secure conferment of’.
'vouchsafe' also found in these Oxford entries:
