'depreciable' originates from Late Latin, specifically the word 'depretiāre' (also 'depretiare'), where 'de-' meant 'down' and 'pretium' meant 'price, value,' combined with the English suffix '-able'.

'depretiāre' evolved through Medieval Latin 'depreciāre' and entered English as 'depreciate'; by adding the suffix '-able,' it eventually became the modern English word 'depreciable'.

Initially, it meant 'to lower the price or value,' but over time it evolved into its current meaning of 'capable of being depreciated; subject to loss of value (especially for accounting)'.