劣等 (liè děng) is an adjective meaning 'inferior grade' or 'substandard', describing something of noticeably poor quality, low rank, or deficient value compared to accepted standards. The first character 劣 (liè) means 'inferior' or 'poor', often implying moral or functional deficiency; the second character 等 (děng) means 'grade', 'class', or 'level'. Together, they form a compound that emphasizes categorical low standing — not merely 'bad', but officially or objectively ranked below standard. It’s commonly used in formal, evaluative, or regulatory contexts, such as livestock classification, product certification, or academic assessments.

This term carries a strong negative connotation and is rarely used in casual speech. It frequently appears in official documents, agricultural reports, or quality control settings — for instance, labeling animals unfit for breeding or meat production due to genetic defects or health issues. While it can technically describe objects or services, its most characteristic and frequent usage relates to biological or material classifications where hierarchy and standards matter.