Cuna: A crib or other small bed made specifically for a child or baby.
Tierna: This word is often translated as "tender" and is frequently used, as here, as an adjective of affection.
Heno: Hay.
Prestaban: The verb prestar most often means "to loan" or "to lend." However, it is often used, as here, to mean "to give."
Buey: Ox.
Bramaron: Bramar refers to the groaning sound of an animal. Here the verb is probably best translated as "bellowed."
Mas: Without the accent, mas typically means "but." The word isn't used much in everyday speech, where pero is generally preferred.
Sí: Sí most often means "yes." As can the English word, sí can also be used as a way of affirming or emphasizing what has been said.
Mírame: The verb mirar can mean simply "to look." In this context, however, it also carries the meaning of "to watch over." Mírame is a combination of two words, mira (watch over) and me (me). In Spanish it is common to attach object pronouns to the end of certain verb forms — commands, gerunds (see amándome below) and infinitives.
Pensando en: In Spanish, the phrase for "to think about" is pensar en.
Me guardes a mí: This is a redundancy. In everyday speech, me guardes (watch over me) would be sufficient. Although in speech the addition of the grammatically unnecessary a mí might be done for reasons of emphasis, here it is used to help provide the right number of syllables for the music.
Amándome: This is a combination of two words, amando (loving) and me (me).
Da: In this context, da is the imperative (command) form of dar (to give) used when speaking to a friend or family member. This the phrase da tu bendición means "give your blessing" or simply "bless."
Haznos: Another combination of two words, haz (the imperative form of hacer, to make, used when speaking to a friend or family member), and nos (us). Thus the phrase haznos más dignos means "make us more worthy."
Mansión: Usually a dwelling place, but sometimes a mansion. In this context, tu gran mansión figuratively refers to heaven.
