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Old English wæter, from Proto-Germanic *watar (cf. Old Saxon watar, Old Frisian wetir, Dutch water, Old High German wazzar, German Wasser, Old Norse vatn, Gothic wato "water"), from PIE *wodor/*wedor/*uder-, from root *wed- (cf. Hittite watar, Sanskrit udrah, Greek hydor, Old Church Slavonic and Russian voda, Lithuanian vanduo, Old Prussian wundan, Gaelic uisge "water;" Latin unda "wave").
Linguists believe PIE had two root words for water: *ap- and *wed-. The first (preserved in Sanskrit apah) was "animate," referring to water as a living force; the latter referred to it as an inanimate substance. The same probably was true of fire (n.).
To keep (one's) head above water in the figurative sense is recorded from 1742. Water cooler is recorded from 1846; water polo from 1884; water torture from 1928. First record of water-closet is from 1755. Water-ice as a confection is from 1818. Watering-place is mid-15c., of animals, 1757, of persons. Water-lily first attested 1540s.
measure of quality of a diamond, c.1600, from water (n.1), perhaps as a translation of Arabic ma' "water," which also is used in the sense "lustre, splendor."
Old English wæterian (see water (n.1)). Meaning "to dilute" is attested from late 14c.; now usually as water down (1850). To make water "urinate" is recorded from early 15c. Related: Watered; watering.
water wa·ter (wô'tər)
A clear, colorless, odorless, and tasteless liquid essential for most plant and animal life and the most widely used of all solvents. Freezing point 0°C (32°F); boiling point 100°C (212°F); specific gravity (4°C) 1.0000; weight per gallon (15°C) 8.338 pounds (3.782 kilograms).
Any of the liquids that are present in or passed out of the body, such as urine, perspiration, tears, or saliva.
The fluid that surrounds a fetus in the uterus; amniotic fluid.
An aqueous solution of a substance, especially a gas.
A colorless, odorless compound of hydrogen and oxygen. Water covers about three-quarters of the Earth's surface in solid form (ice) and liquid form, and is prevalent in the lower atmosphere in its gaseous form, water vapor. Water is an unusually good solvent for a large variety of substances, and is an essential component of all organisms, being necessary for most biological processes. Unlike most substances, water is less dense as ice than in liquid form; thus, ice floats on liquid water. Water freezes at 0°C (32°F) and boils at 100°C (212°F). Chemical formula: H2O.