Most ungiving means something that is the least generous or uncharitable. Some synonyms that can be used to replace the word "most ungiving" include tightfisted, selfish, stingy, ungenerous, miserly, and selfish. These words all describe individuals who are unwilling to share their wealth or resources with others. They can also be used to describe situations where something does not provide much benefit or yield much return. The antonyms of most ungiving are generous, benevolent, openhanded, lavish, and munificent, which describes those who give freely and generously to others.