'stratagem' originates from Greek, specifically the word 'stratēgēma,' where 'stratos' meant 'army' and 'agein' meant 'to lead.'

'stratēgēma' transformed into the Latin word 'stratēgēma,' and eventually became the modern English word 'stratagem' through Old French 'stratageme.'

Initially, it meant 'a military plan or tactic,' but over time it evolved into its current meaning of 'a clever plan or scheme.'