The word piety is a noun. It is a devotion to God.
The figure of speech used is personification, where the heart is given human-like qualities of being able to think and feel devotion.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is beneath
The part of speech for "answer" is a noun.
that those slaves have no right to be treated like that. they are human beings, too
The part of speech for "explicit" is an adjective.
The part of speech for "unfamiliar" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.