The word 烤箱 (kǎoxiāng) is formed by directly combining two meaningful characters: 烤 (kǎo), which means "to bake" or "to roast", and 箱 (xiāng), which means "box" or "chest". It is a logical, descriptive compound where the first character specifies the primary function (baking), and the second character describes the object's form (an enclosed container or cabinet). Together, they create the straightforward concept of a "baking box", which is the literal and functional essence of an oven.