The phrase "taking a chunk out of" typically refers to something or someone causing significant damage, loss or harm. And so, antonyms for this phrase would be words or phrases that suggest the opposite - repair, heal, enhance, create, nurture, build, strengthen, protect or preserve. For instance, "building up" suggests increasing or expanding something's value, "protecting" implies safeguarding someone or something from harm. Similarly, "healing" hints at renewal after an injury, "preserving" indicates guarding something from decay or deterioration, while "nurturing" encourages growth and well-being. Thus, depending on the context, antonyms for the phrase can help convey a more positive and constructive tone in conversation or writing.