leave -- The word translated as "leave" has a very wide range of meanings.  It means to "let fall," "give up," or even "get rid of." This same word is the same Greek verb often translated as "forgive" in the NT as in "forgiving sins". It is also translated as "leave", "suffer," and "let" in the New Testament.

your -- The word translated as "your " is the possessive form of the second person pronoun. This pronoun follows the noun so "of yours."

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

sacrifice -- The Greek word translated as "sacrifice" also specifically means "votive offerings" so it is again, a specific word. However, the word is introduced by a definitive article, "the gift" not "a gift." So there is a specific gift being referred to here, so this statement seems to be the answer to a question about a gift. The "your" is also singular.

there -- The Greek word translated as "there" is a the common form of the idea and different from the word translated as there "there" in the previous verse, Matthew 5:23. The difference is that this form doesn't have the same connection to the similar words meaning "cure" and "make amends." In the previous verse, it was in a form that addressed the listener. This doesn't. So the meaning seems more clearly "there" but it creates a play on the previous word.

at -- The Greek word translated as "before" means "in front of" referring to place and when used to apply to time means "beforehand."

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") that the English "the." See this article for more. 

altar, -- "Altar" is a Greek noun that means "altar." It is also an adjective that means "sacrificial." This is not the standard Greek word for "altar" but one that appears first in the Greek OT. It is used only in Judeo/Christian Greek writings.

missing "first"  -- (MW) The untranslated word "first" takes a lot of different types of "first" meanings from its context. Here, it is technically an adjective but it plays the role of the English adverb "initially." However, in the Greek, it comes before the "be reconciled" not before the "go."

Go  -- "Go" is a Greek verbal command that means literally "go under" or "bring under," but Christ usually uses it to mean "go away" and "depart."

and -- The Greek word translated as "and" is used as the conjunction "and", but it also is used to add emphasis ("also"). In a series, it is best translated as "not only...but also." After words implying sameness "as".

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

reconciled -- The Greek word translated as "reconciled" is used by Jesus only once. It consists of two other Greek words, a prefix meaning "through", "in the midst of", or "by (a cause)", and a verb meaning "make other than it is", "give in exchange", and "barter". It has the sense of changing a relationship by making a trade. It is a Greek word that first appears in the NT. This word doesn't appear in the Tuft's Perseus database that is our prime source for information on the use of words in ancient Greek. The above definitions below comes from the Biblical lexicons only, which come from Biblical translations and so are self-referencing. In these situations, it makes sense to go back to its Greek root and the way this word in used in context but this is the only time this word is used in the NT.

to  -- This word "to" comes from the dative case of the "that brother of yours" that was cut. That formt requires the addition of a preposition in English, but the translator must decide which preposition to use: a "to" as an indirect object.

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

person -- (WW) The word translated as "person" means a biological brother, any kinsmen, and more broadly and friend or associate. It is not the word, "man," which can be translated as "person."

untranslated "of yours"  -- (MW) The untranslated word  "yours" is the possessive form of the second person pronoun. This pronoun follows the noun so "of yours."

missing "and"  -- (MW) The untranslated word  "and" is used as the conjunction "and", but it also is used to add emphasis ("also"). In a series, it is best translated as "not only...but also." After words implying sameness "as".

Then -- The Greek word for "then" means "at this time" or "then".

come - (WF) The word translated as "come" is a verb, but in the form of a participle, an adjective ("coming"). The word translated as "come" primarily means "to start out" but Christ usually uses it to mean "come" but not always. It indicates movement, especially its beginning, without indicating a direction toward or away from anything, so it works either as "come" or "go," but it is more like our phrase "being underway." Our English word "show up" captures both the "start" and "come" ideas. 

and -- (IW) There is nothing that can be translated as "and" here in the Greek source. It was added because the previous word was in the wrong form.

offer -- The Greek word translated as "offer" means "to offer" and "to present." It was translated in the previous verse as "bring". The word is specifically used to describe offering sacrifices. The "you" here is singular. It is a command.

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

sacrifice -- The Greek word translated as "sacrifice " also specifically means "votive offerings" so it is again, a specific word. However, the word is introduced by a definitive article, "the gift" not "a gift." So there is a specific gift being referred to here, so this statement seems to be the answer to a question about a gift. The "your" is also singular.

to God. -- (IW) There is nothing that can be translated as "to God" here in the Greek source.