A complete sentence.
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.
noun TOO EASY.
Wicked is an adjective.
"Little" is an adjective, describing the boy. "Boy" is a noun, referring to a young male.
The part of speech for "answer" is a noun.
The part of speech for this particular word is a noun.
Young is an adjective (young children) and a noun (the young).
The word young is an adjective. It means in the early part of life.
The words "also" and "too" are adverbs. They are used to add information, indicate similarity, or show agreement in a sentence.
Younger is an adjective (comparative of young).
noun TOO EASY.
adverb
The word "fellow" can be used as a noun or an adjective.
The word youth is a noun. A youth is a young person.
Not particularly. However, too much tickling can quickly become abusive if it goes on too long.
part of speech
The part of speech for this particular word is a noun.
adverb