老二 lǎo'èr second child Origin Definitions Defs Strokes Stroke Words Sentences Sents lǎo'èr second child 老 lǎo noun [ordinal prefix] prefix used before numbers to indicate order of birth among siblings二 èr numeral second ordinal number two; secondlǎo'èr penis 老 lǎo adjectiveaffix [familiarity prefix] prefix used before a surname to indicate familiarity or respect二 èr numeral two the number two; 2