remercy

remercy

(rɪˈmɜːsɪ)
n
archaic thanks; gratitude
vb (tr) , -cies, -cying or -cied
archaic to thank or express gratitude to
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014