'appealableness' is formed in Modern English from the verb 'appeal' + the adjective-forming suffix '-able' + the noun-forming suffix '-ness'. 'appeal' itself comes from Old French 'apeler' and ultimately from Latin 'appellare' meaning 'to call upon or address'.

'appeal' originates from Old French 'apeler', from Latin 'appellare'; English then formed 'appealable' by adding '-able' and subsequently the nominal abstract form 'appealableness' by adding '-ness' in modern usage.

Initially 'appeal' meant 'to call upon, address (someone)'; over time its legal sense 'to seek review by a higher court' became central, and 'appealableness' came to denote the capacity for such review (with a secondary, rare sense denoting attractiveness).