The antonyms for the word "most shattering" would be "mild," "gentle," "affirming," "soothing," and "comforting." These words convey a sense of calmness and positivity, in contrast to the devastating and heartbreaking impact of something that is "most shattering." Mild refers to something that is not intense or severe, while gentle indicates a soft and delicate approach. Affirming suggests a positive confirmation, and soothing implies relief or consolation. Comforting, on the other hand, connotes a sense of solace or reassurance. These antonyms for "most shattering" provide a range of alternative expressions that can be useful in different contexts, depending on the desired tone and effect.