Translating "dukkha" as "reactivity"
'Dukkha' means 'suffering', that is, mental torment, i.e., a lack of peace. So "reactivity" is certain a type of dukkha since reactivity is disturbing, tormenting &amp; not peaceful. However, other mental experiences are also "dukkha", such as sorrow, lamentation, pain, grief &amp; despair. Reactivity or mental concocting is one kind of dukkha (called sankhara-dukkha; see SN 38.14; "stressfulness of fabricating") but it is not a translation of the word "dukkha". "Dukkha" means "difficult to bear"; "hard to endure".