lǎo     indicates seniority or age

繁体 traditional:
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语法 grammar: 前缀 Prefix
笔记 notes: In this use, 老 is a prefix used with a person's surname to indicate seniority or with numbers to indicate order or birth amongst brothers and sisters in a familar. For example, 老大 'eldest child' (ABC 'lǎo' 老 prefix 1; Kroll '老' 1a; Norman 1988, p. 113; Sun 2006, loc. 691).
话题 topic: 附类 (Affixes)

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