The part of speech for "answer" is a noun.
bass
Bass is the bottom-most voice or instrument part. For example, string bass, or the bass voice.
part of speech
The part of speech for this particular word is a noun.
adverb
what part of speech is work
what part of speech is beneath
The bass or lowest part; as, to sing basso., One who sings the lowest part., The double bass, or contrabasso.
The part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "buried" is a verb.