Etymology

From Proto-Germanic *in ‎(“in, into”) + Proto-Germanic *laidijaną ‎(“to lead, cause to go”), causative of Proto-Germanic *līþaną ‎(“to go”), from Proto-Indo-European *leit-, *leith- ‎(“to leave, depart, die”). Equivalent to Old English in- ‎(“in, into”) + lǣdan ‎(“to lead”). Cognate with Old High German inleitan ‎(“to introduce”).