感かん染せん性せいMeaningsNoun1. infectiousnessKanji used感feelings染dye性nature (of a person)Composed of感かん染せんinfection; contagion; becoming infected; being infected (e.g. with harmful ideas); being influenced (by)Noun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun