The lazy vowel is also known as a schwa vowel makes a short vowel u sound as in the words: the, of, a, from, done, come, some, mother, brother, about, around, America, etc. When I teach students how to read I teach the schwa sound (an unstressed vowel) as "the lazy vowel" as we can say more emphatically: You are THE man! Usually we say "the" with an unstressed vowel or schwa sound.