老于世故 lǎoyúshìgù worldly-wise Origin Definitions Defs Strokes Stroke Words Sentences Sents 老 lǎo nounadjective experienced experienced; skilled; having long practice in a field于 於 yú preposition in Indicates a location, scope, or time; equivalent to 在 zài世故 shìgu worldly-wise sophisticated or experienced in the ways of the world, often with a hint of being slick or cynical