'uncomprehending' originates from the prefix 'un-' meaning 'not' and the verb 'comprehend' from Latin 'comprehendere', where 'com-' meant 'together' and 'prehendere' meant 'to grasp'.

'comprehendere' transformed into the Old French word 'comprendre', and eventually became the modern English word 'comprehend'. The prefix 'un-' was added to form 'uncomprehending'.

Initially, 'comprehendere' meant 'to grasp together', but over time it evolved into its current meaning of 'understand'. 'Uncomprehending' thus means 'not understanding'.