土膏 tǔgāo fertility of the soil; fertile land Origin Definitions Defs Strokes Stroke Words Sentences Sents tǔgāo fertility of the soil; fertile land 土 tǔ noun soil soil; earth; dirt; clay膏 gāo fertile (bound form) fertile; rich; lushtǔgāo opium 土 tǔ [opium] (bound form) crude opium膏 gāo noun paste paste; cream; ointment; thick liquid or medicinal preparation