变质
How to Understand
变质 refers to the process of something changing in quality or nature, usually in a negative way. It is commonly used to describe food spoilage or the degradation of materials over time. Unlike simple change, 变质 implies an undesirable transformation.
The character 变 means 'to change' and 质 means 'substance' or 'quality.' Together, they form a compound that literally translates to 'change in substance,' emphasizing a shift from a good or original state to a worse one.
变质 is often used in contexts like food safety, where it indicates that something is no longer safe to consume. It also appears in scientific or industrial settings to describe material degradation. In daily conversation, people might use it to describe things like spoiled milk or old medicine becoming ineffective.