missing "Oh"  -- (MW) The untranslated word "o" is an exclamation "O!" or "Oh!" often used as a mode of address. 

You -- This is added to indicate that the following word is in the form of address, using it as a term to identify someone.

unbelieving -- The Greek word translated as "unbelieving " means literally "no faith," but it meant "not to be trusted" and "mistrustful." The word translated as faithless means literally without faith, but not in the sense of lacking religious faith. It means both untrustworthy and distrusting. It carries a sense that someone who is distrusting is also probably untrustworthy.

generation, -- The word translated as "generation" means "race" or "family." It is the word from which we get "genus" in English. The sense is a "type" or a "specimen" of a particular type Jesus uses it to refer to a type of person, specifically those like the Pharisees.

how -- The word translated as "how long" means "until" but it also means "in order that."

long -- The word "long" here means "when", "at what time", "at some time or other", "at some unknown time, and "at some time in the future."

shall -- This is from the future tense of the following verb.

I -- This is from the first-person form fo the following verb.

stay -- (WW) -- The verb "stay" 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. 

with -- (CW)  The word translated as "with" means "towards", "before," "by reason of (for)," and "against."  the sense here is "before." This is not the common "with" that is used in the Matthew version.

you? -- The "you" here is plural, indicating many of Christ's listeners as the object of the verb.

how -- The word translated as "how" means "until" but it also means "in order that."

long -- The word "long" here means "when", "at what time", "at some time or other", "at some unknown time, and "at some time in the future."

shall -- This is from the future tense of the following verb.

I -- This is from the first-person form fo the following verb.

missing "myself"-- (WV) A phrase is necessary because the form of the previous verb is a middle voice, which means that the subject is to  act on "myself," "for myself" or "by myself."

put up -- (CW)  The word translated as "put up" primarily means "to hold up", "to lift up", "sustain", "appear," with a lot of related meaning about supporting yourself or others. This word is only used in this verse and its parallel in Matthew and Luke. This is not the "suffer" seen earlier in Mark 9:12.

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

you?  -- The Greek pronoun "you" here is plural and in the form of an indirect object, "to you", "for you", etc. 

Bring -- The word translated as "bring" means "to bear", "to carry", "to bring", "to produce," and "to fetch." It is the base of a lot of words Christ uses commonly, including the words that mean "bring together", "bring to," and "bring through." Its use is more like our use of the word "get."

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

boy -- (WW)The word translated as "boy " is the Greek word commonly translated as third-person pronouns in English.  The word is an object of the verb, what is brought.

to  -- (CW) The word translated as "to" means "towards," "by reason of (for)," "before" both in time and place, "in the presence of," "against," and several other types of "before." This sense here is "before."

me. -- "Me" is the regular first-person pronoun in Greek. An accusative object indicates movement towards something or a position reached as a result of that movement.