From Longman Dictionary of Contemporary Englishopen-handedˌopen-ˈhanded adjective 1 GENEROUSgenerous and friendly an open-handed offer of help2 done with your hand open an open-handed slap
Examples from the Corpus
open-handed• It is fanciful to assume that a tight-fisted state will produce open-handed citizens.• Nevertheless my problems with my master's open-handed generosity persisted.• Martha's a very open-handed, generous person.• Not a punch; an open-handed slap to the side of the face. 