A word for being taken unawares
In current English, surprise names both an unexpected event and the jolt of feeling that follows it. As a verb it means to come upon someone without warning, to catch them off guard, or to leave them astonished. The older military use is still available: a force can surprise a garrison. Birthday cakes and pop quizzes sit at the milder end of the same idea. The origin of the word surprise is older and more physical than those everyday uses suggest.
From French into Middle English
English did not inherit the word from Old English. It borrowed it from French in the later Middle Ages. The immediate source is Old French surprise, already a thirteenth-century noun for a taking of someone unawares. That noun is the feminine past participle of the verb written sorprendre or surprendre, attested in the twelfth century with the senses to overtake, seize, or invade.
Dictionaries do not all agree on the first English date. Some etymological surveys place the noun in the late fourteenth century, originally for an unexpected attack or capture. Other standard references date first use to the fifteenth century; one major historical dictionary’s earliest citation is from 1457. The spread is typical of late Middle English borrowing. By the 1400s the word is established in English, whether or not a slightly earlier fourteenth-century instance survives in the written record.
Anglo-French also had close variants such as supprise and sousprise. Those forms mixed the prefix that means over with sus- or sous-, under, and they later tangled with English suppress. That tangle is a side path, not the main line, but it helps explain older spellings and a few obsolete senses of oppression. The spelling surprize remained ordinary for centuries and still appears as a rare variant.
Over plus take
The French verb is a transparent compound. Sur- means over or upon and comes from Latin super. Prendre means to take and comes from Latin prendere, a contracted form of prehendere, to grasp or seize. Prehendere itself splits into prae-, before, and a second element -hendere, from the Proto-Indo-European root reconstructed as *ghend-, to seize or take.
The literal picture is not wonder. It is being overtaken: seized from above, or from in front, before you can meet the blow. English later received a more bookish set of relatives from the same Latin verb by a different route, straight from Latin rather than through French: apprehend, comprehend, and prehensile. The French past participle prise, taken, also sits inside enterprise, comprise, reprise, and apprise. Prison and prize, in the sense of something seized, belong to that same network of taking.
Romance cognates of the French noun are easy to see: French surprise, Spanish and Italian sorpresa, Portuguese surpresa, Romanian surpriză. Germanic languages often built a parallel image instead of borrowing the French form. German Überraschung and Dutch verrassing both rest on being caught over or overtaken. English get is usually traced to the same Indo-European root *ghend-, which makes the French loan a distant cousin of a native verb of taking, even though the English noun itself is not a native inheritance.
From ambush to astonishment
The earliest English uses stay close to the raid. A surprise was an attack or capture carried out before the other side knew what was happening. The verb, formed from the noun or from the Anglo-French past participle, first meant to overcome or overpower, including in the sense of emotions overwhelming a person. That emotional-overpowering sense later died out.
The military verb, to attack without warning, is clear by the mid-sixteenth century; one standard American dictionary dates it to 1548. By the 1590s the noun had widened to anything unexpected, and the verb to coming upon someone unawares. Around 1600 the inner feeling, astonishment at the unexpected, is in place. The phrase taken by surprise appears toward the end of the seventeenth century. The sense to strike with sudden astonishment is seventeenth-century as well.
Later English kept the old military picture in special phrases. In 1826 a surprise party could still mean a stealth military detachment. Only in the mid-nineteenth century, by about 1857, does the festive gathering at an unsuspecting friend’s house take that name. Earlier American usage sometimes meant a congregation arriving at a preacher’s house with food and support, also called a donation party. An eighteenth-century cookery sense, a dish that looks plain until opened, is a brief side shoot from 1708.
The modern birthday party and the older ambush are not a contradiction. Both are seizures of attention before the target is ready. What changed is the instrument: soldiers, then covered dishes, then candles.
What the pieces still show
If you pull the word apart, the French compound is still visible: over plus taken. That is the useful remainder. English did not begin with a name for a pleasant jolt. It began with a word for being seized before you could meet the blow, and only later let the feeling, the gift, and the party grow out of the raid.