Salla: The dart
Salla is the dart that lodges in flesh. One dart landed with the injury itself, and the crying over it drives a second one in beside the first, so the hurt doubles while the body stays the same. Put to a people already bleeding in exile, "why do you cry" is the question of someone checking whether the patient is worsening the wound with their own hands.
Kamma: Deeds ripening
Kamma is action bearing its own fruit. The striking hand and the multiplied sins arrive in one breath, so the blow is the crop of what was planted, coming up in its season. Nothing arbitrary has landed on this people, which is grim to hear and useful to know, since a wound with a traceable cause is a wound that can be worked on.
Āsava: Taints that seep
Āsava names the deep leanings toward craving and ignorance that seep through everything a person does, like discharge from an old sore. "Incurable" is honest about the surface: fresh bandaging accomplishes nothing while the infection sits underneath. Sins that "increased" kept flowing from a source that lament cannot reach, which is why the count kept climbing on its own.
Saṃvega: Urgent shock
Saṃvega is the jolt that arrives when the state of things finally lands. Telling a grieving people their pain has no cure is not cruelty, it is the hard word that stops the crying and turns the head toward the cause. A doctor who softens the diagnosis leaves the patient comfortable and dying, and this one is delivered to people who still have time to act on it.
Nirodha: Cessation
Nirodha is the ending of an effect once its cause stops. "Incurable" holds for exactly as long as the sins keep increasing, and healing is promised to this same wound a few lines on, so the words describe a present condition and leave the future open. Take away the fuel and the fire goes out; no one has to put it out.