masc nom sg of sammāvāyāma (noun); masc nom sg of sammāvāyāma (adj)
Analysis. sammā (sammā adverb, 'rightly, correctly') + vāyāma (exertion, effort); a compound meaning 'exertion done rightly'. In the Eightfold Path, sammāvāyāmo refers to the sixth factor: the cultivation of wholesome states and the abandonment of unwholesome ones.
Etymology. sammā is saṁ + mā, from √mā 'to measure', literally 'measured together', hence 'properly, rightly' (cognate with Sanskrit samyak). Vāyāma is from √vī 'to separate, exert' or related to vāya 'wind', suggesting the sense of effort and exertion. The compound idiomatically denotes right effort as the cultivated striving along the path.
Meanings from the Digital Pāḷi Dictionary; morphology and etymology by Claude.
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