ケイスイ
Meanings
Noun
1. light water
Pitch accent
イスイ
Composed of
light (e.g. aircraft, truck); light motor vehicle (up to 660cc and 64bhp); kei car
Wednesday; shaved ice (served with flavored syrup); water (fifth of the five elements)
Used in vocabulary (2 in total)
light-water reactor
light-water nuclear reactor