One spelling, several jobs
In present-day English, right is an unusually crowded word. It can mean factually correct, morally just, or legally due. It names the side opposite left, a conservative political camp, an immediate moment (right now), and the act of setting something upright again. Those uses did not all arrive at once.
The oldest English senses already mixed geometry with judgment. A line could be unbent; a path, the shortest course; an action, a fit with custom or law. Later English piled on accuracy versus error, a claim a court will recognize, a hand, and a seating block in a legislature.
The origin of the word right is Old English riht in West Saxon and Kentish, reht in Anglian, with further spellings such as rieht and ryht. The same family already supplied a noun, an adverb, and a verb. The word is inherited from Germanic, first recorded in the Old English period, before 1150. It is not a loan from French or Latin, even though Latin cousins later entered English on a separate track.
A home-grown form
Middle English kept a thicket of spellings (right, riht, ryght, and others with yogh) before the modern shape settled. None of that points to borrowing. The adjective, the noun for what is due or lawful, the adverb rihte (directly, justly, exactly), and the verb rihtan (to straighten a path, amend, restore, govern) are one inherited set.
That matters because English later filled itself with Latin-looking relatives: correct, direct, rectify, rectangle, rector. Those words are historically related, but they are not the parents of English right. They came in through Latin rectus, straight, and Latin regere, to direct or rule. The native word was already in the language.
Straightened, then just
Comparative reconstruction places Old English behind Proto-West Germanic reht and Proto-Germanic rehtaz, an adjective reconstructed as both straight and morally upright. The matching noun is reconstructed as rehtą, a right in the sense of what is due. Further back, linguists reconstruct a Proto-Indo-European adjective meaning straightened, from a verbal root for making something straight or directing it. Older dictionaries often print that root as reg; more recent work writes it with a laryngeal. The two labels are scholarly notation, not two competing English histories.
The physical picture is simple: a thing brought into line. From that picture, several languages developed words for justice, law, and correct conduct. The same root is reflected in Latin rectus; in Greek orektos, stretched out or upright; in Old Irish recht, law; and in Sanskrit rju, straight. Germanic sisters include German and Dutch recht, Old Saxon reht, Old Frisian riucht, Old Norse rettr, and Gothic raihts.
English did not invent the metaphor of moral straightness. Lithuanian teisus, right or true, is literally straight, a parallel, not a source.
Duty, law, and a claim you can hold
By Old English the noun was already doing legal and ethical work. It could mean what is morally fitting, a duty, a rule of conduct, the law of a land, what someone deserves, and a legal entitlement to property or privilege. The adjective covered lawful, legitimate, orthodox in belief, and fitting according to a standard, as well as the literal unbent line.
Middle English often set the noun against might, or against wrong. From the early fourteenth century it could also mean a right action, a good deed, and from there the right as that which is just. The later sense of conforming to fact or reason, correct as opposed to mistaken, is recorded in the late sixteenth century. Fitness and justice are older in this word than laboratory accuracy.
The legal meaning in human rights or a right to property is not a modern graft. It is one of the Old English noun’s jobs, later stretched from a concrete title in land toward abstract civil entitlements.
The side that used to have another name
The directional sense is the latecomer. Ordinary Old English for the opposite of left was swiþra, literally stronger, used of the preferred hand and then of that side of the body. Riht did not normally mean left’s opposite; that use is rare beside the stronger-hand word.
In late Old English, and clearly by the early twelfth century, riht was applied to the preferred hand. Sources offer two motives and do not choose between them: the right hand is typically the stronger, or it was treated as the proper, correct hand. By about 1200 the sense had spread from the hand to that side of the body, then to limbs, clothing, and other objects. The noun for the right hand or right side is attested from the mid-thirteenth century.
Dutch and German recht followed a similar path from straight and just to not-left. French droit, from Latin directus, straight, shows the same semantic slide in another branch. Across languages, words for this pair of sides tend to start with the hands. English eventually aligned the preferred hand with the old word for unbent and lawful, and swiþra dropped out of ordinary speech.
A hall, not a moral discovery
Political right is younger still, and it is a translation of seating, not a new moral theory packed into the native noun. In the French National Assembly of 1789, supporters of monarchy and tradition sat to the president’s right. English conservative as an adjective in this sense is recorded in the 1790s; the noun for that camp in the 1820s.
That use rides on the directional adjective, not on Old English riht as duty or just claim. A legal right and the political right share a spelling. They do not share one uninterrupted meaning.
What the verb still shows
The verb keeps the oldest picture in view. To right a ship is to bring it upright. To right a wrong is to straighten an injury, a sense already available in late Middle English as redress. Old English rihtan could straighten a path, set something up, amend, guide, or restore. The adverb preserves the direct line as well: rihte already meant in a straight manner, justly, and exactly, the ancestor of right now.
A concrete landmark is the lost rival swiþra. English could have kept stronger as the everyday name of one side of the body. Instead it reused the word for straightness and fitness, then, centuries later, reused that new directional sense for a political bloc that happened to sit on that side of a hall. The legal noun never needed that detour. It had meant a just claim while the hands still had another name.