'arthrousness' originates from Greek, specifically the word 'arthron', where 'arthr-' meant 'joint', combined with the English adjectival suffix '-ous' and the noun-forming suffix '-ness' to create the noun.

'arthrousness' developed from the adjective 'arthrous' (used in scientific/New Latin contexts from formations like 'arthros-' or 'arthro-') and was formed in modern English by adding '-ness' to describe the state or quality.

Initially rooted in the Greek sense of 'joint', the formation originally described things 'having joints' and has remained consistent in meaning, now used to denote 'the quality or state of being jointed'.