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

any one -  (WW) The word translated as "any one" is one word meaning "all," "the whole," "every," and similar ideas.  The "one" comes from its singular form. This is the word from "everyone" not "anyone," which is a different word.

heareth  - (WF) Heareth" is from a Greek verb that means "to hear" and "to listen." It has the same sense as the English not only of listening but of understanding. However, it is in the form of a noun, hearing" or "everyone hearing."

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

word  -  (CW) "Word" is translated from a Greek word that means "explanation" or "calculation." It is the source of our word "logic" and is the root word for all the English words that end in "-ology." Most biblical translations translated it as "word" for somewhat poetic reasons.

of -- This word "of"  comes from the genitive case of the following word that requires the addition of a preposition in English.  The most common is the "of" of possession.

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

kingdom,  - The word translated as "kingdom" can be the region, the reign, the castle or the authority of a ruler. Christ does not seem to use it to mean a physical region, so its translation as "reign" seems more appropriate. This is especially true because the "reign" of a king means the execution of his will.

and -- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis ("also")

understandeth  - (WF) "Understandeth" is from a Greek verb which means "to bring together" or "to set together." It is also a metaphor for "perceive," "hear," and "understand" as we would say that we "put it all together" when figuring something out. It is also in the form of a noun or adjective, "understanding."

it -- This English objective pronoun is added and not in the Greek source.   In Greek, pronoun objects are not repeated after each verb because they are implied by their first occurrence.

not,  - The negative "not" used here is the Greek negative of a subjective opinion, commands, and requests. The sense is that "you don't want" to do something or it "doesn't seem" to be done, not that it isn't done. If it wasn't done, the objective negative of fact would be used. Here it is used because "understanding" is about thought.

then  - (IW) There is no Greek source for "then" here either. Like the "when" that began this section, it was added by the KJV translators.

cometh  -- The word translated as "cometh" primarily means "to start out" but Jesus 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.

the  - (WW) There is no definite article in Greek, but when a word doesn't have a definite article, the indefinite article ("a," "an")  can be added in English translation.

wicked  -  (WW) The word translated as "wicked" means "second-rate" or "worthless." This article explores its meaning in more detail. It is an adjective, but when used as a noun, therefore, "what is worthless." See this article for more.

one,  - This is added to capture the masculine form of the adjective.

and-- The Greek word translated as "and" is used as the conjunction "and," but it also is used to add emphasis ("also"). I

catcheth away - "Catches away" is from a Greek verb that means "to snatch away," "to carry off," and "to seize hastily." It is from the root that means "lift up."

that which -- The word translated as "that which" is the Greek definite article, which when not preceding a noun, takes the meaning of "the one" or, in the plural, "the ones." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

was -- (WT) This helping verb "was" indicates that the verb is passive. Helping or auxiliary verbs are needed to translate the Greek verb forms into English. Howewver, this is the simple past, but the Greek is the past perfect so "has been sown."

sown  - "Sown" is from the verb meaning "to sow," which itself is a verbal form of the Greek word for "seed." However, here, the verb is in the form of a adjective, "seeding." It is passive and in the perfect tense, indicating an action that completed in the past.

in -- The word translated as "in" means "in," "within," "with," "during" (time),  or "among"  with a dative object as the one here.

his -- The word translated as "his" is the Greek word commonly translated as third-person pronouns in English.  This pronoun follows the noun so "of his."

heart.  - The "heart" is from a word that means the physical heart as well as the seat of emotions. It was used by Jesus to mean the seat of the "higher" emotions or desires that motivate people. Symbolically, it connects with the realm of relationships and emotions.

This  - "This" is translated from a Greek word that means "this," "that," "the nearer."

is  - The verb here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition.

he which -- The word translated as "he which" is the Greek definite article, which when not preceding a noun, takes the meaning of "the one" or, in the plural, "the ones." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

received seed " - Received seed" is from the verb meaning "to sow," which itself is a verbal form of the Greek word for "seed." However, here, the verb is in the form of an adjective describing something that is sown at sometime in the passive, "was seeded."

by  - The Greek preposition translated "by," primarily means "besides" and "beyond." It also has a number of specialized 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") than the English "the." See this article for more. 

way side.  - "Way side" is from a word meaning "the way" or "the road" but which is used symbolically to mean "a way of doing things" or "a philosophy of life." In Acts, followers of Jesus are described as those "belonging to the way."