A pace English treats as its own
Today walk is the ordinary English verb for moving on foot slower than a run. It also names the outing itself, a path laid out for that outing, and, more loosely, a way of living. Few everyday verbs are this specific. English keeps a three-way split among going, walking, and running that many related languages do not bother to mark with a dedicated root.
The origin of the word walk sits in a much older idea of motion, not in a verb invented for feet. For most of its recorded life in English, the stem did not mean taking steps at all.
Two Old English verbs, one later spelling
Walk is native. It was not borrowed from French or Latin after the Conquest. Middle English walken is the meeting point of two Old English verbs that already looked and sounded close: wealcan, a strong reduplicating verb meaning to toss, roll, or move round, with past weolc and participle wealcen, and wealcian, a weaker verb meaning to curl, roll up, or muffle. The strong form carries most of the later history. Glossators used it of a boiling sea. It could also mean to turn something over, including a thought turned over in the mind.
By about 1200 the same stem, now written walken or walke, is used of people traveling, wandering, going from place to place, and, more and more narrowly, going on foot. Historical dictionaries treat that foot-travel sense as a Middle English development, even though the verb itself is already Old English. One late Old English gloss, gewealcon, for a crossing of water, may hint at motion rather than rolling, but it is not enough to prove that speakers already used the word as we do.
The strong past welk still appears in the 1400s. The weak past walked, the form in use now, is recorded from the 1200s and eventually replaced it. That change of conjugation is common in English and does not by itself explain the change of meaning.
Rolling, kneading, and fulling on the Continent
Behind the Old English pair stands a West Germanic and then a Proto-Germanic verb, reconstructed as walkaną or a close variant. Its cousins mostly kept a physical, hands-on sense. Middle Dutch walken meant to knead, press, or full cloth. Old High German walchan meant to knead. Modern German walken still means to full fabric and, by extension, to beat. Old Norse valka meant to drag about. Danish valke and Swedish valka are fulling verbs. Scottish English kept a related fulling verb, waulk, as a doublet of the southern form.
Fulling matters because the work was done by pounding or treading wet fabric until it felted. The occupational surname Walker, a fuller, is often cited as evidence that English once used the verb that way. The difficulty, which etymologists flag rather than tidy away, is that in English the cloth-working sense is not clearly attested earlier than the meaning of travel on foot. It may still be the missing bridge. It may be a later specialization, or a sense that drifted in from Low German. The written record does not force a choice.
Deeper than Germanic the trail thins. Some handbooks attach the family to a Proto-Indo-European root wel- meaning to turn or revolve, or to walg- meaning to twist and move. Others, including the Oxford tradition, say there are no certain cognates outside Germanic. Sanskrit valg- , to leap, and Latin valgus, bow-legged, are phonologically tempting and semantically unconvincing. At least one major American dictionary simply calls the further origin uncertain. That is the honest stopping point.
How rolling became stepping
On the page the change of meaning looks abrupt. At the end of the Old English period the strong verb still means to roll. At the start of Middle English it means to move about and to travel. One account is specialization from being in motion. Another is the fulling-by-treading route already mentioned. A third, offered in the historical dictionaries, is that a colloquial Old English use, something like wandering around, was already in speech, and that after the Conquest, when people wrote closer to how they talked, that spoken sense took over the written verb and the old rolling meaning dropped away.
Once the foot sense was in place, English piled other uses onto it without needing a new root. By the thirteenth century a bestiary can apply the verb to snakes. By about 1300 it can mean to live or conduct oneself in a certain way, often in religious prose that renders Latin ambulare. Early in the fourteenth century restless spirits move about on earth under the same verb. By the middle of that century fear or plague can be said to be abroad and at work. Sleepwalking is recorded around 1600. Transitive uses follow: covering a distance on foot, exercising a dog, later escorting someone home.
The noun is younger than the verb in its familiar senses. Around 1200 it can still mean a tossing or rolling. By the mid-thirteenth century it is an act of going on foot. By the late fourteenth it is also a stroll, a journey, and a path made for walking. Manner of walking is a seventeenth-century development. Walk of life is eighteenth.
What the surname still remembers
The most concrete residue of the older Germanic meaning is not a fossil sense in everyday speech but a surname and a craft term. Walker named the person who fulled cloth, and German walken still means to full. The English verb moved on. It narrowed to a gait the language treats as distinct from both going and running, and it left the older work of rolling, kneading, and trampling to its cousins. That split, more than any reconstructed root beyond Germanic, is what the history actually shows.