The antonyms for the phrase "most niggardly" would be generous, bountiful, liberal, open-handed, and charitable. These words denote a willingness to give and share without hesitation, hoarding, or counting the cost. Being generous involves giving more than what is expected, while being bountiful means giving away abundance, especially when it comes to blessings, resources, and opportunities. Liberal is a term that emphasizes freedom, tolerance, and broadmindedness, whereas being open-handed means being freehanded, magnanimous, and lavish in giving. Lastly, being charitable means showing compassion and kindness to others, especially those who are less fortunate or in need.