Origin: Latin suffix -ous
Ungenerous has 3 different meanings across 1 category:
lacking in magnanimity
"it seems ungenerous to end this review of a splendid work of scholarship on a critical note"
"a meanspirited man unwilling to forgive"
unwilling to spend (money, time, resources, etc.)
"she practices economy without being stingy"
"an ungenerous response to the appeal for funds"
Not generous; stingy.