English speakers still use quake as a verb of the body and of the ground. A person may quake with cold, fever, rage, or fear. A floor, a hillside, or a whole city may quake after a blast or a rupture in the crust. The matching noun once meant any such trembling. In present-day prose it is usually a clipping of earthquake, the sense that headlines prefer. That later narrowing sits on a much older native verb.
The origin of the word quake is not a borrowing from French or Latin. It is inherited English. Old English already had cwacian, a weak verb meaning to tremble, shudder, or chatter, used of people and of the earth. Teeth could cwacian in bitter cold. A speaker could report that he cwacode through a fever. Psalm language used the same verb when the ground itself shook. From that Old English verb came Middle English quaken, with a crowd of spellings: quakie, quacken, early cwakien, and even forms with initial wh-. Dictionaries that date the modern English verb place its first known use before the twelfth century because the Old English record is already in place. The later spelling with qu- is a French-influenced way of writing the same initial /kw/ that Old English had spelled cw-, the same shift that turned cwic into quick and cwen into queen.
A weak verb that once looked strong
Old English cwacian conjugated as a weak verb: past cwacode, participle cwacod. Middle English speakers did not leave that pattern entirely alone. Beside regular quaked they built a strong past quoke, on the analogy of native pairs such as shake and shook, take and took. The analogical past is now archaic. Standard English has gone back to the weak type, quaked and quaking. The brief strong interlude is still useful as evidence that medieval speakers heard the word in the same family as other old verbs of motion and shock, even while its conjugation stayed mostly weak.
The same root produced a causative neighbor in Old English, cweccan, to shake, swing, or set something vibrating. That verb survives in the little-used English quitch. A verbal noun cwacung already named shaking or trembling in Old English, so the later common noun did not have to be invented from nothing. What changed was which form English preferred in everyday speech.
An English cluster, not a tidy foreign pedigree
Beyond Old English the trail thins quickly. Some comparative handbooks reconstruct a Proto-Germanic verb along the lines of kwakon, with an imitative sound as its likely source, and they point to later Dutch, German, or Scandinavian words built on similar kwak- shapes. Other standard etymologies refuse that step. They treat cwacian and cweccan as English words of unknown further origin and say there are no certain cognates outside the language. The caution is warranted. A kwak- or quak- onset is easy to coin for a sudden shake, a croak, or a splash, and several Germanic verbs of quacking and croaking sit nearby without proving that they are the same word as quake.
Inside English the picture is a little clearer. Lexicographers often group quake with quaver, quiver, quag, and Middle English quaven, a verb of trembling recorded around 1200. Those forms look and feel related, as if speakers kept reshaping a sound-symbolic kernel rather than importing a learned stem. No Indo-European root needs to be forced onto that cluster. If the ultimate source is imitation, that is a fact about how the language built a verb of shaking, not a gap waiting to be filled with a Latin or Celtic cousin. Claims that tie the English verb to Latin vexo or to Irish bogadh go well beyond what the safer sources will support.
From a fear-tremor to a headline noun
The independent noun is younger than the verb. It is first recorded in the early fourteenth century in the sense of a trembling from fear. For a long time it stayed rare except in compounds. The collocation that mattered most was earthquake, attested in late thirteenth-century English as a formation from earth plus this native shaking-word. Old English had not used that compound. It named the same disaster with other native phrases: earth-din, earth-quaking of a different morphological cut, earth-heaving, earth-stirring. Middle English also borrowed terre-mote from Old French, itself from Latin terrae motus, a learned rival that did not permanently displace the homegrown compound.
Only in the 1640s is quake itself securely attested as a short form of earthquake. That clipping is now the noun’s ordinary meaning. The older sense of a personal shudder has not vanished from the verb, but it has receded in the noun, which in news copy almost always means a seismic event, sometimes extended in a figure to any shock large enough to feel like one. The history is therefore not a late metaphor from geology back onto the body. The verb had always covered both the earth and the person. The modern noun simply chose the terrestrial half and wore it as a headline.
Related English keeps the bodily sense in view. Quaking aspen, recorded for the North American tree by 1822, names leaves that tremble in a light wind. Quaking grass does the same for Briza, whose spikelets shiver on thin stalks. Quaker as an agent noun is older than the religious nickname: in the early fifteenth century it could mean simply one who trembles. In the 1650s the same formation was applied, not as an official title, to members of the Religious Society of Friends, whether from reports of shaking in worship or from an admonition to tremble at the word of the Lord. The sectarian sense is a social story laid on top of the verb, not a separate etymology.
What the Old English record already knew
A useful check on the later clipping is the Old English evidence itself. Long before English newspapers shortened earthquake to quake, a psalm gloss could say that the earth cwacode. Heaven and earth could cwacian together in a homily of the last day. The modern short noun looks new only if one starts from the Middle English compound. Start from cwacian, and the headline is a return to a use the verb had from the beginning: the ground, like a fevered body, can shake, and English never needed a foreign root to say so.