Avijjā: Ignorance
Not-knowing, the root the rest of the chain hangs from. "Their error" renders a word for wandering off the road, and Paul has already traced the wrong turn back to an earlier moment, when truth got traded for a lie and worship went to the made thing. A traveler who takes the wrong fork in the dark keeps walking in good faith, and every mile after bends further from where they meant to go.
Anusaya: The underlying tendency
Passion lying dormant beneath the surface, like coals banked under ash. Burning toward one another does not begin at the moment of burning; the readiness was laid down long before, waiting only for an occasion and a face to attach itself to. So the useful question concerns what has been sleeping in someone and what has been feeding it, more than which body happened to strike the spark.
Rāgaggi: The fire of lust
One of three fires the Buddha said the whole world is burning with. "Burned in their lust" needs almost no translating into Pali: the eye burns, the seen thing burns, and the feeling that comes of that contact burns too. A fire grows hungrier the more wood you feed it, and that hunger is the danger here, whichever way the flame happens to lean.
Kāmesu micchācāra: Sexual misconduct
The lay training rule covering sexual harm. Its Pali wording marks off those already under someone's protection, by family, marriage, vow, or law, so the fault it locates is always a trust broken or a consent missing. Held against that measure, "inappropriate" becomes a question with a plain test, who was injured and how, and two people turning toward each other do not fail it by that fact alone.
Kammavipāka: Action and its ripening
Deeds bearing fruit in the one who does them. "Receiving in themselves" is exact: no sentence comes down from a bench, the result grows where the seed went in, inside the doer's own habits and heart and the ordinary weather of a day. "Due" then carries the sense of fitting that fruit has with its seed, an accuracy no court could arrange from outside.