engineer (person qualified or professionally engaged in engineering)
Etymology
Modified, based on the verb ingénier, from Old Frenchengigneor, itself from engin or from Medieval Latiningeniator or ingeniārius(“one who makes or uses an engine”), from Latiningenium(“an engine”), from in(“in”) + gignō, gignere(“to produce, cause”). The distinction was likely intentionally made to separate the word from the unrelated Old French engigneor(“deceiever”).