“The word Hosanna is a transliteration of a Hebrew word of supplication which means in essence ‘Oh, grant salvation.’ Evidently the people were asking the Savior to teach them the way to salvation; thus it is not surprising that he immediately teaches them the basic principles and ordinances of the gospel” (Daniel H. Ludlow, A Companion to Your Study of the Book of Mormon [1976], 261–62).
Church Educational System -

Church Educational System

Book of Mormon Student Manual (2009 Edition)