μακάριοι (adj pl masc nom) "Blessed" is makarios which means "blessed", "prosperous", "happy", "fortunate," and "blissful." --

οἱ δοῦλοι (noun pl masc nom) "The servant" is doulos, which means a "slave," a "born bondsman," or "one made a slave." --

 ἐκεῖνοι, (adj pl masc nom) "Those" is ekeinos (kakeinos), which means "the person there", "that person", "that thing", "in that case", "in that way", "at that place," and "in that manner." 

οὓς (pron pl masc acc) "Whom" is hos, which means "this", "that", "he", "she", "which", "what", "who", "whosoever", "where", "for which reason," and many similar meanings. --

ἐλθὼν (part sg aor act masc nom) "He cometh" is erchomai, which means "to start," "to set out", "to come", "to go," and any kind of motion. It means both "to go" on a journey and "to arrive" at a place. --

ὁ κύριος (noun sg masc nom) "The lord" is kyrios (kurios), which means "having power", "being in authority" and "being in possession of." It also means "lord", "master of the house," and "head of the family." -

εὑρήσει (verb 3rd sg fut ind act) "Shall find" is heurisko, which means "to find", "to find out", "to discover", "to devise", "to invent", "to get," and "to gain." --

γρηγοροῦντας: (part pl pres act masc acc) "Watching" is from gregoreo, which means "to become fully awake," and "to watch."

 ἀμὴν (exclam) "Verily" is amen, which is the Hebrew, meaning "truly", "of a truth," and "so be it." It has no history in Greek of this meaning before the NT. However, this is also the infinitive form of the Greek verb amao, which means "to reap" or "to cut."

 λέγω (1st sg pres ind act) "I tell" is lego, which means "to recount", "to tell over", "to say", "to speak", "to teach", "to mean", "boast of", "tell of", "recite," nominate," and "command." It has a secondary meaning "pick out," "choose for oneself", "pick up", "gather", "count," and "recount." A less common word that is spelled the same means "to lay", "to lay asleep" and "to lull asleep." 

ὑμῖν (pron 2nd pl dat) "To you" is humin the plural form of su the pronoun of the second person, "you." 

ὅτι (adv/conj) "That" is hoti, which introduces a statement of fact "with regard to the fact that", "seeing that," and acts as a causal adverb meaning "for what", "because", "since," and "wherefore." --

περιζώσεται [uncommon](verb 3rd sg aor subj ind mid) "He shall gird himself" is perizōnnymi, which means "to gird round oneself", and "to gird oneself with".

καὶ (conj/adv) "And" is kai, which is the conjunction joining phrases and clauses, "and," or "but." 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." 

ἀνακλινεῖ [uncommon](verb 3rd sg aor subj ind act) "Make them sit down," is from anaklino, which means "to lean one thing upon another", "to cause to recline at a table", "to push", "to put back", "to open," and, in the passive, "to lie", "to sink", "to lean back", "to recline," and "to slope upwards (of ground)."

αὐτοὺς (adj pl masc acc) "Them" is autos, which means "the same," and the reflexive pronouns, "myself", "yourself", "himself", "herself", "itself," or the oblique case of the pronouns, "him", "her," and "it." It also means "one's true self," that is, "the soul" as opposed to the body and "of one's own accord." 

καὶ (conj/adv) "And" is kai, which is the conjunction joining phrases and clauses, "and," or "but." 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."

παρελθὼν (part sg aor act masc nom) "Will come forth" is parerchomai, which means "go by", "pass by", "outstrip" (in speed), "pass away", "outwit", "past events" (in time), "disregard", "pass unnoticed," and "pass without heeding." 

διακονήσει (verb 3rd sg aor subj act ) "Serve" is from diakoneo, which "to act as a servant", "to minister," and "to perform services."

αὐτοῖς. (adj pl masc dat) "Them" is autos, which means "the same," and the reflexive pronouns, "myself", "yourself", "himself", "herself", "itself," or the oblique case of the pronouns, "him", "her," and "it." It also means "one's true self," that is, "the soul" as opposed to the body and "of one's own accord." -- The word translated as "him" is the Greek word commonly translated as pronouns in English, but it has a few shades of meaning our pronouns do not have.  The word means "the same" when used as an adjective, and when used as a pronoun can mean "the true self" as opposed to appearances.