'misplaceable' originates from English, formed from the verb 'misplace' + the adjectival suffix '-able', where the prefix 'mis-' meant 'wrongly' and 'place' (from Old French 'place' < Latin 'platea') meant 'position' or 'to put'.

'place' came into English via Old French 'place' (from Latin 'platea'), 'mis-' is an Old English prefix meaning 'badly' or 'wrongly'; these combined into the verb 'misplace' in Middle English, and later the suffix '-able' was added to form the adjective 'misplaceable'.

Initially, the root elements expressed 'putting in the wrong place'; over time the derived adjective came to specifically mean 'capable of being misplaced' or 'easily lost'.