its a noun
A prepositional phrase.
As in verifiable truth - noun
True is an adjective since it describes a noun, like a true fact.
The part of speech for "answer" is a noun.
'Untrue' is an adjective because it describes something, such as 'That fact is untrue.'
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 part of speech for "explicit" is an adjective.
The part of speech for "indefinite" is an adjective.