Matthew 12:49

Vocabulary (Greek word by word)

Ἰδοὺ ( verb 2nd sg aor imperat mid ) "Behold is from idou, which means "to behold," "to see," and "to perceive." It acts as an adverbial phrase in this form meaning "Lo! Behold!" and "See there!' It is a form of the verb eido, which means "to see."

ἡ (article sg fem nom)  "The" is the Greek definite article, hos, ("the"). 

μήτηρ (noun sg fem nom) "Mother" is from meter, which means "mother," "grandmother," "mother hen," "source," and "origin."

μου (pron 1st sg masc gen) "My" is mou, which mean "my," or "mine." 

καὶ "And" is from kai, which is the conjunction joining phrases and clauses, "and," or "also." After words implying sameness, "as" (the same opinion as you). Used in series, joins positive with negative "Not only...but also." Also used to give emphasis, "even," "also," and "just."

οἱ (article pl masc nom)  "The" is the Greek definite article, hos, ("the"). 

ἀδελφοί (noun pl masc nom)"Brothers" is from adelphos, which means "son of the same mother," "kinsman," "colleague," "associate," and "brother."

μου (pron 1st sg masc gen) "My" is mou, which mean "my," or "mine." 

KJV — word by word

Behold  - -- "Behold" is a verbal command meaning "See!" and "Look!" It is from the most common word meaning "to see" in Greek. In a humorous vein, it is also an adverbial exclamation like we use the phrase "ta-da" in a magic show, or "voila" in French which means "see there". "Look here!" or "See there!" comes closest in English. Jesus uses it both ways.

my  -- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine."  

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. 

mother  - "Mother" is from the common Greek word for "mother" and "grandmothers," but it also means "the source" of something.

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."

my -- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine."

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. 

brothers! - "The word translated as "brothers" means "kinsmen," and "associate," but generally it means "sons of the same mother."

NIV — word by word

Here - -- (WW) "Here " is a verbal command meaning "See!" and "Look!" It is from the most common word meaning "to see" in Greek. In a humorous vein, it is also an adverbial exclamation like we use the phrase "ta-da" in a magic show, or "voila" in French which means "see there". "Look here!" or "See there!" comes closest in English. Jesus uses it both ways.

are -- There is no verb "are" in the Greek source. It is implied by the subjects (mother, brothers) without a verb.

my  -- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine."  

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. 

mother  - "Mother" is from the common Greek word for "mother" and "grandmothers," but it also means "the source" of something.

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."

my -- "My" is the first-person possessive singular pronoun. This pronoun follows the noun so "of mine."

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. 

brothers! - "The word translated as "brothers" means "kinsmen," and "associate," but generally it means "sons of the same mother."