Water is native, Old English wæter, with cousins throughout Germanic — German Wasser, Dutch water, Old Norse vatn, Gothic wato — and beyond, from an Indo-European root meaning "water, wet" that also gives Russian voda and, through Greek, English hydro-.
The w at the front is itself a useful marker. Latin and Greek roots essentially never begin with w, so an English word starting with that letter is almost always native or Germanic: water, wind, wolf, work, warm, wife, wood. The exceptions are borrowings from other Germanic languages or from further afield. Water was one of the handful of basic elements in ancient physics, and the phrase to have one's head above water is recorded from the 1660s in the literal sense and from 1742 in the figurative one.
water (n.1) Old English wæter , from Proto-Germanic *watr- (source also of Old Saxon watar , Old Frisian wetir , Dutch water , Old High German wazzar , German Wasser , Old Norse vatn , Gothic wato "water"), from PIE *wod-or , suffixed form of root *wed- (1) "water; wet." In ancient conceptions one of the handful of basic elements of which everything is composed. To have one's head above water (and thus avoid drowning) is by 1660s; in the figurative sense "out of difficulty" it is recorded from 1742. Water-cure for healing therapies involving water is by 1842. The crowd-control water-cannon is so called by 1964; water-fountain "drinking fountain" is by 1946. Water-buffalo is attested by 1894. W ater polo is attested from 1884; water torture from 1928. Waters for "seas of a particular region," especially "maritime claims of a nation," is by 1650s. Linguists believe PIE had two root words for water: *ap- and *wed- . The first (preserved in Sanskrit apah as well as Punjab and julep ) 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.). water (v.) Middle English watren , from Old English wæterian "moisten, irrigate, supply water to; lead (cattle) to water;" from water (n.1). The meaning "dilute" is attested from late 14c.; now usually water down (by 1850). Of the mouth, "salivate as a symptom of appetite," mid-15c. To make water "urinate" is recorded from early 15c. Related: Watered ; watering . water (n.2) measure of quality of a diamond, c. 1600, from water (n.1), perhaps (OED, 1989) a translation of Arabic ma' "water," which also is used in a sense of "luster, splendor." also from c. 1600
water came in through Old English, and its spelling follows that family's conventions.
What gives it away on the page
| w- at the start | Latin and Greek roots essentially never begin with w.water, wind, wolf |
Placing it without the spelling
| one syllable, or two with the stress up front — blunt and concrete | Old Englishwolf, water, knee, bridge |
Old English in the spelling guide · guess another word's family