The antonyms for the word "calcifying" are softening, liquefying, dissolving, melting, and reducing. Calcifying refers to the process in which calcium builds up in tissues, causing hardening and stiffening. However, the opposite of calcifying involves the break down of hardening and stiffening. Softening refers to the loosening or weakening of something to make it supple and flexible. Liquefying and melting refer to the conversion of a solid into a liquid by heating, causing a loss of hardness. Dissolving implies the dispersal of calcified material, and reducing refers to the shrinkage in size or amount of calcification. These antonyms highlight the opposite effects of calcifying, which can occur in various biological, chemical, and environmental contexts.