高龄 gāolíng elderly
How to remember 高龄: 高 high + 龄 age = elderly.
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How it is used
- Advanced age (respectful) - 高龄老人 (gāolíng lǎorén) a very elderly person; 高龄产妇 (gāolíng chǎnfù) an older/advanced-maternal-age mother.
- A polite/formal way to note someone's great age, and a medical term for older pregnancy.
- Register: respectful/formal; contrast blunt 老 (lǎo, old).