The phrase "etymological root" is correct and usable in written English.
It refers to the origin or source of a particular word, phrase, or concept. For example, the etymological root of the English verb "to sign" is the Latin word "signare" which has the same meaning.
The etymological root of the word "capitalization" is the Latin caput, "head".
(This etymological root is retained in France, where the element beryllium is also known as glucinium).
I was fairly confident that my resolve could hold out (the noun "fast" and the adjective have the same etymological root, in the concept of firmness), but not everyone blows off the serpent.
Cool, conceptual color photographs, videos and an installation by this Israeli-born artist explore the intersection of life and death via a visual exegesis of bread, whose etymological root in Hebrew relates to the word for war.
As Miljački pointed out in her opening address, the etymological root of "influence" is "influenza", suggesting influence can be something that happens to you, a process of permeation, rather than a flagrant and willful act of rip-off.
In the New Testament, no stress can be placed on the etymological (root) meaning of eu ("good"); in Luke, chapter 3, verse 18 (as in other places), the word means simply authoritative news concerning impending judgment.
Mr. Obama has said that Barack has the same etymological roots as the Hebrew name Baruch, "one who is blessed".
In Murray's vision, words were followed by their myriad definitions, etymological roots and quotations illustrating shades of meaning.
We see the quasi-familial connection of the nation to its territory in terms like patrie, Vaterland and rodina, all from "parental" etymological roots.
Like yocto, its etymological roots lie in the Greek octa yotta signifies one thousand raised to the 8th power, and yocto signifies one thousandth raised to the 8th power.
Some of the commonest synonyms for walk in the English language (such as trudge, stroll and saunter) have no clear etymological roots.
