grātīs adv.
for gratiis, out of favor, through kindness, without recompense, without pay, for nothing, gratuitously, gratis : frumentum dare: ne gratis in provinciā male audires: rei p. servire: praetor factus est.
grātīs, adv., v. gratia, B. fin. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
·adv For nothing; without fee or recompense; freely; gratuitously. ...
Webster's Dictionary of the English Language