'anuresis' originates from New Latin/medical Latin, formed from Greek elements: 'an-' (meaning 'without') and a stem from Greek 'ourein' (to urinate) yielding 'uresis' (related to urination).

'anuresis' was formed in New/Medical Latin from Greek components (e.g. Greek 'an-' + a form related to 'ourein') and was adopted into modern English medical vocabulary largely unchanged.

Initially and historically it meant 'absence of urination' or 'without urination,' and this core meaning has been retained in modern medical usage.