Thou is a pronoun, specifically a second person singular pronoun. It is an older form of "you" used in Early Modern English.
Thou is an older version of you, and you is a pronoun, therefore, Thou is a pronoun.
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
Thou is an older version of you, and you is a pronoun, therefore, Thou is a pronoun.
part of speech
The part of speech for this particular word is a noun.
"Hear his speech but say thou nought."
"Hear his speech, but say thou naught."
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.