元交際相手

もとこうさいあいて

noun

•

former boyfriend, former girlfriend

元	beginning, former time, origin
交	mingle, mixing, association, coming & going
際	occasion, side, edge, verge, dangerous, adventurous, indecent, time, when
相	inter-, mutual, together, each other, minister of state, councillor, aspect, phase, physiognomy
手	hand