feckless

the word 'feckless' originated in late 16th century scots, formed from the scots word 'feck', an aphetic form of 'effect'. 'feck' itself carried the meanings of value, vigor, and efficacy. the suffix '-less', of old english origin, denotes absence. therefore, the literal construction means 'without effect' or 'lacking vigor'. over time, the meaning evolved from simply 'ineffective' to more strongly imply a character flaw of irresponsibility and a lack of determination or purpose. it stands as a more literary and condemnatory synonym for 'irresponsible' or 'inept'.

Structure: feck + less feck (scots, from middle english fek, a variant of 'effect', meaning 'value, vigor, efficacy') + less (old english suffix -lēas, meaning 'without, lacking')