Unto -- This word "to" comes from the indirect object form of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object. However, the translator can choose other prepositions: "with,"  "in,"   "of,"  "as," "by," "for," "at," or "on" depending on the context.

what -- The Greek word translated as "any" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine and feminine, so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," "which," or even "why."

is -- The verb "is" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics.  The word also means "to exist" and where it doesn't connect to characteristics or conditions.

the -- The word translated as "the" is the Greek definite article, "the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

kingdom -- The word translated as "kingdom" can be the region, the reign, the castle or the authority of a ruler. Christ does not seem to use it to mean a physical region, so its translation as "reign" or "realm" seems more appropriate. This is especially true because the "reign" of a king means the execution of his will.

of -- This word "of"  comes from the possessive form (genitive case) of the following word that requires the addition of a preposition in English.  The most common is the "of" of possession.

missing "the/this"  -- (MW) The untranslated word is the Greek definite article," the," which usually precedes a noun or changes the word it precedes (adjective, infinitive, participle, etc.) to act like a noun. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," and "those"). See this article for more.

God -- The word translated as "God" means "God" and "deity." It is introduced with an article, so "the God," "the Divine" or "the divine one." Jesus often uses it this way perhaps to indicate the one God as opposed to the pagan gods. When a definite article does not introduce it, it refers more generally to "divinity," the nature of God.

like? -- The word translated as "like" is an adjective that means "like," "resembling," and "matching."

and -- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis.

whereunto -- The Greek word translated as "whereunto" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine and feminine, so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," "which," or even "why."

shall -- This helping verb "shall" indicates that the verb is the future tense or a form that indicates possibility at some time. A "might" or "should" could work here or nothing at all in an "if/when/whoever" clause which implies a possibility.  Helping or auxiliary verbs are needed to translate the Greek verb forms into English.

I -- This is from the first-person, singular form of the verb.

resemble -- (CW) The verb translated as "resemble" is a verb that means "to make like" and, in the passive, "to become like." This word doesn't mean "resemble" in this situation.

it? -- The word translated as "it" is the Greek word commonly translated as third-person pronouns in English in the form of a singular object of a verb or preposition. It refers to feminine nouns not just female people, so it is translated as both "she" or "it" depending on the context. It also means "by oneself" or "alone."