'systematically-transmitted' originates from the combination of 'systematic' and 'transmitted'. 'Systematic' comes from the Greek word 'systēmatikos', meaning 'pertaining to a system', and 'transmitted' is derived from the Latin 'transmittere', where 'trans-' meant 'across' and 'mittere' meant 'to send'.

'Systematic' evolved from the Greek 'systēmatikos' through Latin and Old French, while 'transmitted' evolved from Latin 'transmittere' through Old French 'transmettre'.

Initially, 'systematic' meant 'pertaining to a system', and 'transmitted' meant 'to send across'. Over time, they combined to describe something spread in an organized manner.