The adjective "storable" is a modern formation built upon the well-established English verb "store." The verb "store" itself has a rich history, entering English via Old French estorer from the Latin instaurare, meaning to renew, restore, or set up. The suffix "-able," of Latin origin via French, is a prolific adjective-forming element that denotes capability. Therefore, the literal morphemic construction "capable of being stored" directly and logically yields the modern abstract meaning, describing an item's suitability for being kept in reserve for future use. This pattern of appending "-able" to a verb to create a descriptive adjective is a standard and productive process in English word formation.

Structure: stor (to keep) + able (capable of) - stor: From Middle English storen, from Old French estorer (to build, restore, supply), from Latin instaurare (to renew, restore). In this word, it functions as the verb root meaning "to keep or put away." - able: From Old French -able, from Latin -abilis (capable of, fit for). It is a suffix forming adjectives meaning "capable of, fit for, or worthy of undergoing the action of the verb."