砸 (zá) means to smash or strike something hard, often with a tool or heavy object, physically breaking it. It also has a colloquial sense of 'messing up' (e.g., a task or exam). Unlike 摔 (shuāi), which is about accidentally dropping or falling, 砸 implies deliberate force; unlike 粉碎 (fěn suì), which means shattering into tiny pieces, 砸 is broader and more everyday.