missing "if"  -- (MW) The untranslated word  "if" here expresses a condition but it means nothing regarding whether that condition is met or not. It also means "if ever" and "whenever."

Whosoever -- -- The Greek word translated as "whoever" in the singular means "anyone," "someone," and "anything."

will  - (CW)This "will" verb expresses consent and even delight in doing something. It means "to consent" and "to be resolved to a purpose." As a participle, it means "willingly" and "gladly." This "will" is not the same as the helper verb "will" in English that expresses a future tense.

come -- (WF) 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 "start," "come," or "go," but it is more like our phrase "being underway." Our English word "show up" captures both the "start" and "come" ideas. See this article for more.

after  --  -- The term translated as "back" means "back" in space but "after" in time. It is followed by a possessive which tells us whose back it is.  The logic regarding time is that, since the future is unseen, it should be regarded as behind us, whereas the past is known and therefore before our eyes. This seems quite strange to English speakers, but the use of this word in Greek is well-established to mean "future." Our English view coincides with the ancient Greek when discussing books. The "back" of the book in English means the "end" of the book, which is the future for the reader. This use of "back" is identical to the Greek.

me, -- "Me" is the first-person singular pronoun, but it is a form requires that addition of extra words in English to capture its meaning.  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. 

let -- The "let" here comes from the form of the verb, which is a command or request in the third person. In English, all commands are directed to the listener, but in Greek such statements can be made about other parties or even things. In English, we would used a helper verb "must" or "should."

him -- This is from the third-person command form of the verb "deny."  It is the subject so "he" is more accurate.

deny  --  "Deny" is translated from a Greek word that means "to rejects" and "to deny utterly." The form is that of a verbal adjective, "denying."  The form is the middle voice, a person acting on themselves.

himself, -- "Himself" is a special reflexive pronoun that means "himself," "herself," and so on.  This word is implied by the form of the verb, but here it is made explicit.

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 can be translated as "not only...but also." After words implying sameness "as."

take up -- "Take up" is one of Christ's favorite "multiple meaning" words. It is a verb that means "to raise up," "elevate," "to bear," "to carry off," "to take and apply to any use," and "to cause to cease."Christ uses this verb to refer to what will happen to "the son of man," which can apply either to his being raised from the dead or lifted up on the cross.

his -- The word translated as "his" is the Greek word commonly translated as third-person pronouns in English.  The word means "the same" when used as an adjective. In the adverbial form, it  means "just here" or "exactly there." 

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. 

cross,  -(CW)  The word translated as "cross" means a stake or post, like those used to hold up a tent. It describes not the crossbar of a cross, but the stake on which the crossbar is hung. Among people traveling, it would mean pulling up the central stake of a tent to use it as a walking stick. See this article about this word.

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 can be translated as "not only...but also." After words implying sameness "as."

follow --  The term "follow" means "to follow," or "go with," in a physical sense, but it is also a metaphor meaning "to be guided by" or "to follow the meaning of." This verb takes the indirect form of an object when it is a person.

me. -- The "me" is in the indirect object form on the first-person pronoun, so usually "to me," though the form has other uses in Greek.