cathodic

the word 'cathodic' is built upon the noun 'cathode', which was coined in 1834 by the english scientist michael faraday. he derived it from the greek 'kathodos', meaning 'a way down' or 'descent', combining 'kata-' (down) and 'hodos' (way, road). faraday used this term to designate the electrode where electric current was thought to descend into or leave a solution. the adjective-forming suffix '-ic', of greek and latin origin, was then appended to create 'cathodic', meaning 'pertaining to a cathode'. thus, the term's logic moves from the literal greek concept of a downward path to the specific modern technical sense of the negative electrode in an electrical system.

Structure: cathod (cathode) + ic (adjective suffix) cathod (from greek 'kathodos', a way down, descent, from 'kata-' down + 'hodos' way, road); ic (from latin '-icus', greek '-ikos', adjective-forming suffix meaning 'of, pertaining to').