Labour --  "Labor " is a word Christ uses humorously. It means "work," "do," or "make," but it is not the common word Jesus uses frequently, but a more sophisticated word he uses less commonly. This is a verb from the more common noun translated as "deeds" or "works." Jesus uses it to mean "make a living for yourself." The form is either passive, "be worked," of in the middle voice where the subject acts for./by himself, so "work for yourself."

not -- The negative used here is the Greek negative of a subjective opinion, commands, and requests. The sense is that "you don't want" or "think" something, not that it isn't done or thought.   With the verb "to be," the sense is "doesn't seem." When a negative precedes the verb, it affects the whole clause. When it precedes other words, its force is limited to those words. This is the negative used with commands or requests. Used with an imperative to express a will or wish. Used in negative "when" and "if" clauses.

for -- This completes the idea of the verb.

the -- The word translated as "the" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more.

meat -- This word means "meat", "pasture", "eating, "taste," and "flavor. It is from a verb meaning "eating" and "eating up." Jesus only uses this word six times, always in the sense of "eating."

which -- (CW) The word translated as "which" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

perisheth, -- (WF) The word translated as "perish" means to destroy or demolish. The form is not an active verb but an participle, "perishing." It is either passive, "being destroyed" or the middle voice, "destroying itself."

but -- The Greek word translated as "but" denotes an exception or simple opposition. It is used to emphasize the contrast between things like we use "instead," "but instead,"or "rather." It is not the common word usually translated as "but." It is the Greek word "other" like we use "otherwise." Jesus often uses this conjunction to connect a negative clause, not doing something, with a positive one, "instead do this."

for -- This completes the idea of the verb.

that -- The word translated as "that" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

meat -- This word means "meat", "pasture", "eating, "taste," and "flavor.

which -- (CW) The word translated as "which" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

endureth -- The word translated as "endureth" has more of a sense of to "stay" or "remain," not necessarily dwelling in a place, though the KJV often treats it that way.

unto -- The word translated as "unto" means "into" a place, "towards" as a direction, "in regards to" a subject, and "up to" limits in time and measure.

everlasting -- "Everlasting" is an adjective based on the word that means "age" or "eon." It has the sense of "perpetual" or "ageless."

life, -- The word translated as "life" means "living" but it also means "substance," "existence," and "property."Jesus uses it to mean the "existence" of physical life, spirit plus body. To learn more read this article on life eternal, For more on how Christ uses this word with other words about human existence (soul, heart, spirit, body, etc.), read this article.

which -- The word translated as "which" is a demonstrative pronoun ("this" "that"), but it often acts as a pronoun "which," "what," "who," "whosoever," "where," "for which reason," and many similar meanings.

the -- The word translated as "the" is the Greek definite article. The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

Son -- The word translated as "son" more generally means "child" or "descendant." The phrase "the son of man" is the common way Christ refers to himself. It is discussed in detail in this article. Its sense may be "the child of the man."

of -- This word "of"  comes from the genitive case of the following word that required the addition of a preposition in English.  The most common is the "of" of possession, but it can also mean "belonging to," "part of," "which is," "than" (in comparisons), or  "for," "concerning" or "about" with transitive verbs. 

missing "the"  -- (MW) The untranslated word is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

man - The Greek word for "man" means "man," "person" and "humanity" in the singular. In the plural, it means "men," "people," and "peoples." 

shall -- This helping verb "shall" indicates that the verb is the future tense. Helping or auxiliary verbs are needed to translate the Greek verb forms into English.

give -- The verb translated as "given" means "to give," "to grant," "to hand over," "appoint," "establish," and "to describe." It is almost always translated as some form of "give."

unto -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object.

you: --  The "you" here is from the plural, dative, second-person pronoun.

for --The word translated as "for" introduces a reason or explanation so "because" and, in questions, "why." However, since this word always appears in the second position, it is more like an aside remark like, "consequently" or "as a cause." 

him -- (CW) The word translated as "him" means "this/that thing/person here/there." Here it is masculine, so 
"this person here." It usually comes after the previous noun, emphasizing it. Here, it begins the sentence and stands alone.

hath -- (WT) This helping verb "hath" indicates that the verb is the tense indicating an action completed in the past. This is not the tense of the verb here.

missing "the"  -- (MW) The untranslated word is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

God - (WP) 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. This word appears separate from "the Father" by the verb.

the   -- The word translated as "the" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more. 

Father -- "Father" is the Greek noun that means "father" or any male ancestor so "forefathers." It is the word that Christ uses to address his own Father.

sealed.  -  "Sealed" is from a verb that Jesus only uses here that means "to close," "to close with a seal," "to authenticate [a document with a seal]," "to close up [as with a seal]," and "to set a seal of approval upon."