Antonyms of adj niggardly

1 sense of niggardly

Sense 1
grudging, niggardly, scrimy -- (petty or reluctant in giving or spending; "a niggardly tip")

INDIRECT (VIA stingy) -> generous -- (willing to give and share unstintingly; "a generous donation")

Similarity of adj niggardly

1 sense of niggardly

Sense 1
grudging, niggardly, scrimy -- (petty or reluctant in giving or spending; "a niggardly tip")
       => stingy (vs. generous), ungenerous -- (unwilling to spend; "she practices economy without being stingy"; "an ungenerous response to the appeal for funds")