'ascendible' originates from Latin, specifically the word 'ascendere', where the elements 'ad-' (toward) and 'scandere' (to climb) combined to mean 'to climb up'.

'ascendible' developed through Middle English forms related to 'ascend' (from Latin 'ascendere') and was formed by adding the adjectival suffix '-ible' (from Latin '-ibilis'), yielding the modern adjective meaning 'capable of being ascended'.

Initially related to the action 'to climb' or 'to go up'; over time it evolved into an adjectival sense meaning 'able to be climbed' or 'capable of being ascended'.