In the lesson, "Il nous apprend les mots." came up and means "He teaches us the words." So how does one easily distinguish when "apprendre" is being used to mean learn or teach? Does it simply rely on an indirect object in the sentence to make it clear that it's not (obviously) "he learns to us the words" despite being terrible English grammar. Is having an indirect object the requirement for using "apprendre" to mean "teach"?