The confusion is linguistic, it can be clarified by reference to personal experience.
The pali for pain is dukkha. The pali for suffering is Dukkha. The listener needs to differentiate between the two based on context. ![]()
Hindi as one of the daughter languages of Pali uses the same word in much the same way. There is a famous advertisement from the 80’s for a pain balm where the child, pointing at a red twisted ankle tells the mother “Ma, dukh raha hai!” (Ma, its paining) And then there is the advertisement in which the person upset over an electricity bill from an airconditioner is asked “Kyon duhkhi ho rahe ho?” (Why are you upset?). One is physical, the other is mental.
As a young man, my first few months in military training were hell. Endless hours of gruelling physical workouts, intensive theory classes, sleepless nights… I suffered greatly. The mind was dark, the mood sullen. It was torture simply to haul the body around. But then something peculiar happened. One day, my mind simply gave up. I stopped fighting, I simply accepted orders and did what had to be done. An unexpected freedom opened up. The forced route marches were still physically painful… but there was no more suffering. I could view bodily pain with detachment. The mind was light, the mood joyful… so much so that I actually look back at those days fondly. ![]()
Physical pain is one thing, Suffering another.
Circling back to the suttas. Aging is described as dukkha. But what aspect of aging is dukkha? Grey hair, wrinkles, diminished vision, diminished hearing, tremors… none of these are physically painful. But suffering? That can be out of all proportion.
Similarly, there are illnesses which are not in the least painful. A painless Death can be ensured. Yet, people suffer.
Pleasurable (and also neutral) feeling, pleasurable sense experiences, pleasurable thoughts… these are all understood by the Arahant as having an intrinsic nature of Suffering- if attached to. The cessation of craving and attachment brings about an immediate end to that suffering. If it was not so, if pleasurable (and neutral) feelings, sense experiences and thoughts were to be experienced as suffering in and of themselves, then enlightenment would cause an increase in suffering for the Arahant as compared to the putthujana (who has only painful feelings to suffer from!). From this it can be understood that painful feeling, painful sense experiences and painful thoughts too are not suffering in and of themselves- they are suffering only if attached to (in the sense of wanting them gone).
The cessation of rebirth happens as a natural consequence of not being attached to the aggregates - hence the focus on parinibbana is unwarranted. The primary goal is to do away with ignorance and craving right here and right now.
The Buddha promised us freedom from Suffering. Immediately effective… to be personally experienced by the wise. Nibbana, here and now.