永えい久きゅう硬こう水すいMeaningsNoun1. permanent hard waterKanji used永eternity久long time硬hard like a rock水waterPitch accentえいきゅうこうすいComposed of永えい久きゅうeternity; permanence; perpetuityNoun硬こうhardnessNoun水すいWednesday; shaved ice (served with flavored syrup); water (fifth of the five elements)Noun