はや 流行らす Show inflections LinksSentence search for 流行らすSentence search for はやらすKanji details for 流 and 行Edit in JMdict Godan verb with 'su' ending, Transitive verb1. to popularize; to popularise; to give currency to; to set a trendSee also 流行らせる Discussions Log in to talk about this word.