The word "赎罪" is formed by combining the character "赎", meaning to redeem or atone, which is composed of the radical "贝" (indicating money or valuables) and the phonetic component "卖", with the character "罪", meaning crime or sin, composed of the radical "罒" (associated with nets or law) and "非" (meaning wrong). The combination directly denotes the action of redeeming or atoning for an offense.