necessity (quality or state of being necessary, unavoidable, or absolutely requisite)

unnecessary

needlessness

necessary evil

water

a female given name / a surname

Combining form of みず (mizu) above

water: one of the five classical elements in traditional Chinese philosophy and medicine / Short for 水曜日 (suiyōbi): Wednesday / shaved ice served with flavored syrup

body of water / fluid, liquid / Short for 水素 (suiso): hydrogen / water

a female given name