The word "too" is an adverb. It can mean also, or it can modify an adjective to mean excessively.
Examples:
When his brother left for town, he went too.
The river was too deep to cross.
The phrase "I was then too young" is a complete sentence comprised of a subject ("I") and a verb ("was"), therefore it is a declarative sentence. It does not represent a single part of speech as it contains multiple elements functioning together.
Wicked is an adjective.
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 phrase "I was then too young" is a complete sentence comprised of a subject ("I") and a verb ("was"), therefore it is a declarative sentence. It does not represent a single part of speech as it contains multiple elements functioning together.
Wicked is an adjective.
part of speech
The part of speech for this particular word is a noun.
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.
The part of speech for "lecturer" is a noun.