'modem-supportive' originates from the combination of 'modem' and 'supportive', where 'modem' refers to a device that modulates and demodulates signals for data transmission, and 'supportive' means providing assistance or backing.

'modem' comes from the word 'modulator-demodulator', and 'supportive' is derived from the Latin word 'supportare', meaning 'to carry' or 'to bring up'.

Initially, 'supportive' meant 'to carry or bring up', but in modern usage, it has evolved to mean 'providing assistance or backing'.