…although the sense of duḥkha in Normative Buddhism is traditionally given as ‘suffering’, that and similar interpretations are highly unlikely for Early Buddhism. Significantly, Monier-Williams himself doubts the usual explanation of duḥkha and presents an alternative one immediately after it, namely: duḥ-stha “‘standing badly,’ unsteady, disquieted (lit. and fig.); uneasy,” and so on. This form is also attested, and makes much better sense as the opposite of the Rig Veda sense of sukha, which Monier-Williams gives in full as “(said to be fr. 5. su + 3. kha, and to mean originally ‘having a good axle-hole’; possibly a Prakrit form of su-stha q.v.; cf. duḥkha) running swiftly or easily (only applied to cars or chariots, superl[ative] sukhátama), easy”. It would seem that there were two forms of each word; Prakrit and Buddhist Hybrid Sanskrit chose the -kha forms instead of the -stha forms, which survived nevertheless in a much smaller way. The most important point here is that duḥ + stha literally means ‘dis-/ bad- + stand-’, that is, ‘badly standing, unsteady’ and is therefore virtually identical to the literal meaning of Greek astathmēta, from a- + sta- ‘not- + stand’, both evidently meaning ‘unstable’. This strongly suggests that Pyrrho’s middle term is in origin a simple calque.
Beckwith, Christopher I.. Greek Buddha: Pyrrho’s Encounter with Early Buddhism in Central Asia (p. 30). Princeton University Press. Kindle Edition.
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The First Noble Truth of Buddhism is usually translated as the truth of ‘suffering, unsatisfactoriness, or stress’. Beckwith presents a sound argument that it actually indicates a philosophical argument that untrained views are ‘badly standing, unsteady’ and not to be relied upon. Beckwith’s argument references Pyrrhonism because Pyrrho is known to have studied Buddhism in Bactria where he lived for ten years in Alexander’s court. During that time Pyrrho learned Buddhist philosophy and used it as the basis of Pyrrhonism, the earliest from of Greek skepticism. Beckwith is working with only attested documents. His argument that Pyrrhonism comes directly from Buddhism is very strong. I highly recommend his book Greek Buddha: Pyrrho’s Encounter with Early Buddhism in Central Asia. ABN