流りゅう行こう性せいMeaningsNo-adjectiveNoun1. epidemicKanji used流current (in a fluid)行go性nature (of a person)Composed of流りゅう行こうfashion; trend; vogue; craze; fad; popularity; prevalence (of a disease); epidemicNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun