'loseable' originates from English, built from the verb 'lose' (Old English 'losian') combined with the adjective-forming suffix '-able' (from Latin '-abilis' via Old French), where the suffix meant 'able to be'.

'lose' changed from Old English 'losian' (meaning 'to perish, be lost') through Middle English forms such as 'losen' and eventually became the modern English verb 'lose'; the productive suffix '-able' entered English via Old French/Latin and combined with the verb to form 'loseable'.

Initially related to the older senses of 'lose' (such as 'to perish' or 'to be ruined'), it evolved so that 'loseable' now specifically means 'capable of being lost or misplaced'.