Vocabulary What does 冷や汗 (ひやあせ, hiyaase) mean? 冷や汗 (ひやあせ, hiyaase) means cold sweat. Quick factsReadingひやあせRomajihiyaasePart of speechnoun 冷や汗ひやあせhiyaasecold sweat1noun cold sweatAlso written: 冷汗Kanji in this word冷cold, cool down汗sweat