The word 'failure' began its life meaning something closer to 'deception' than 'inadequacy.' Latin fallere meant to trick or disappoint — the same root that gives us 'false,' 'fallacy,' and 'fallible.' Vulgar Latin softened this to *fallire, meaning simply to be lacking, and Old French inherited it as faillir. Anglo-French brought the verb to England as failer, which English shortened to 'fail.' The noun 'failure' did not appear until the 1640s, formed with the -ure suffix by analogy with words like 'measure.' Before that, the noun form was simply 'fail,' still preserved in the phrase 'without fail.' The semantic journey is striking: what Latin speakers understood as being deceived by circumstances, English speakers came to understand as personal shortcoming. This shift mirrors broader cultural changes in how Western societies assigned responsibility for misfortune — from fate and trickery to individual accountability.