What English uses it for now
A tempter is a person — and sometimes a thing — that tries to pull someone toward a choice they already suspect is unwise. The noun still carries a moral charge. It names the seducer, the inciter, the figure who holds out a reward for going wrong. Everyday speech can soften the related verb into something as mild as a dessert that looks hard to refuse, but the noun itself stays closer to the older, sterner sense: someone working on another person’s will. The later feminine form temptress covers a woman in that role; tempter has long been able to name a man, a devil, or an impersonal force.
That range is not new. English has used the word this way since the later Middle Ages, and the religious reading has never quite left it.
How the noun reached English
English speakers begin to write tempter, temptour, and kindred spellings in the fourteenth century. The origin of the word tempter is not one clean loan so much as three paths arriving together.
One path is French. Anglo-French and Old French had temptur, tempteour, and tempteur, going back to an older agent form of the verb tempter. Another is church Latin. Late Latin temptator was the agent noun for the one who entices to sin, and it was already a title for Satan. A third path is home-grown: once English had the verb tempt, the ordinary agent suffix -er could build tempter without any further borrowing. Historical dictionaries do not all weigh those routes the same way. Some treat the English noun as formed in part from the verb and in part taken from French or Latin. Others list it simply as a French loan. The earliest dated evidence falls before 1380, in a Middle English text of St. Bernard. None of those accounts has to cancel the others. After tempt was already in the language, adding -er was the obvious next step, and the French and Latin agent nouns sat in the same religious vocabulary.
The verb is older than the noun. Around 1200, English tempten was already used of the devil and the flesh drawing someone away from God’s law. That verb came from Old French tempter and tenter, and from Latin temptare. The noun therefore walked into a language that already had the action.
A rarer twin, temptator, appears from the mid-fifteenth century into the seventeenth. It is a more openly Latinate synonym, never the everyday word, and it faded.
The Latin verb, and the piece of morphology that stuck
Behind the English noun stands Latin temptare, a variant of tentare: to handle, to touch, to try, to test. In classical use the same verb could mean to make an assault. The church sense — to lure toward sin — is a narrowing of that testing and probing. An ordinary Latin temptator was someone who attacks; in ecclesiastical Latin the word became the one who entices, and then a name for the Devil.
The shape of the English word is easy to see. Latin built temptator from the verb stem plus the agent suffix -tor. French recast that as tempteur. English either borrowed the French form, followed the Latin one, or attached -er to tempt — or did all three at once. The -er on tempter is the ordinary English agent ending, the same piece that makes baker and singer.
Deeper than Latin the trail is less certain. One reconstruction starts from a Proto-Indo-European form *tempto-, based on a root meaning to touch or feel, and treats *temp- in the sense of stretching as a plausible candidate. Older Latin dictionaries sometimes tied tentare to tendere, to stretch, which is a related picture if stretching a hand and probing are the same gesture. Lithuanian has been compared as well, in a verb meaning to feel one’s way. None of this is settled. The Latin spelling split between tempt- and tent- is itself a puzzle; some older reference works treated the mp form as an ancient confusion, though similar doublets exist elsewhere in the language. It is safer to say that English tempter sits on a verb of touching and trying than to pretend we can name the first speaker who reached toward something.
Romance languages keep the same stem in living words. Modern French prefers tentateur for the person and tenter for the act; Italian has tentatore and tentare; Spanish has tentar; Catalan has temptador. English attempt is a relative through Latin attemptare. Old English already had a native name for the role, costere, built on a different verb of trying. That word did not survive in this meaning.
What the sense kept, and what it let go
The earliest English uses are religious. A tempter is one who solicits to sin, and the Tempter, with the capital letter, is the Devil. That reading did not vanish. It still turns up in sermons, in later Christian allegory, and in any context that needs a moral antagonist. What changed is the social range. Once the word is fully at home, it can name a human seducer as easily as a supernatural one.
The verb, from the late fourteenth century, also developed the sense of provoking or defying God or fate — the surviving idiom of tempting fate. The noun did not specialize in that direction. A tempter remains, first of all, the person who offers the bait, not the person who dares providence.
There is no dramatic flip in meaning, only a widening from sacred drama into ordinary persuasion. The testing sense that Latin carried — handling, probing, putting to trial — receded in the English noun. In Anglo-Norman the related verb could still mean to sound a depth or probe a wound. English tempter as a noun did not keep that medical or nautical life. What survived is the moral and social sense: someone working on someone else’s desire.
The title that outlasted the native rival
English already had costere for this figure. Tempter won because the French and Latin vocabulary of temptation arrived with the church and with Norman French and then stayed. The most concrete leftover of that history is the capital-T use: the Tempter as Satan. That is not a later poetic flourish. It is close to how Late Latin already used temptator, and it is the sense Middle English writers reached for first. When the word is used of a human being today, it is still standing one step away from that older title.