Whose -- (CW) The Greek word translated as "whose" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine or feminine so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," or even "why." This is a genitive object of the verb, which changes the meaning of the verb. It sense is "from them."

soever - (CW) The Greek word meaning "soever" indicates more of an expectation of something happening than "if" alone. This is how we use the word "when." This is not the simple "soever." CW - Confusing Word -- The "if" does not capture the word's specific meaning.

missing "the/this"  -- (MW) The untranslated word is the Greek definite article," the," 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," and "those"). See this article for more. 

sins  -- (CW) The word translated as "sins" means "missing the mark," "failure," "fault," and "error." Only in religious uses does it become "guilt" and "sin," having no sense of doing malicious evil in Greek. The best English translation is "mistake," "fault," or "failure" rather than what we commonly think of as the evils of "sin." See this article for more information and context.

ye -- This is from the second-person, plural form of the verb.

remit, -- (CW) The word translated as "remit" primarily means "to let go" or "to send away." It has the sense of leaving something alone and letting it drop. This same word is usually translated as "leave," "forgive," "suffer," and "let" in the New Testament. See this article for more.

they - This is from the third-person, plural form of the verb.

missing "should" or "might"-- (MW) A helping verb is necessary because the following verb is a verb of possibility, a subjunctive, something that "should" or "might" occur. The helping verb is not needed in a clause beginning with an "if" or a "when."

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

remitted -- (CW) The word translated as "remitted" primarily means "to let go" or "to send away." It has the sense of leaving something alone and letting it drop. This same word is usually translated as "leave," "forgive," "suffer," and "let" in the New Testament. See this article for more.  Used with the genitive object here, the sense it "release them."

unto -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object. The most common is a "to" for the English indirect object. However, the translator can choose other prepositions: "with,"  "in,"   "of,"  "as," "by," "for," "at," or "on" depending on the context.

them; -- The word translated as "them" or "to them" is the Greek adjective that acts like our third-person pronoun.

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

Whose -- The Greek word translated as "whose" in the singular means "anyone," "someone,"  "something," and "anything." The same forms are used both for the masculine or feminine so "anyone" works best for a person. In the plural, it means "everyone," "some," "they," and "those." Jesus often uses it to start a question so it means "who," "what," or even "why." This is a genitive object of the verb, which changes the meaning of the verb. It sense is "over them."

soever - (CW) The Greek word meaning "soever" indicates more of an expectation of something happening than "if" alone. This is how we use the word "when." This is not the simple "soever."

sins -- (IW) There is nothing that can be translated as "sins" in the Greek source.  A pronoun can be assumed from a previous object, but not a word.

ye-- This is from the second-person, plural form of the verb.

retain, - (WW) "Retain" is a verb that means "to be strong," "to prevail," "to get possession of," and "to lay hold of." In English, "overpower" is a good equivalent. When used with the genitive object here, the sense is "to rule over" or "the be above."

they - This is from the third-person, plural form of the verb.

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

retained. - (WW) "Retained" is a verb that means "to be strong," "to prevail," "to get possession of," and "to lay hold of." In English, "overpower" is a good equivalent. When used with the genitive object here, the sense is "to rule over" or "the be above."