καθίσαντες [15 verses](part pl aor act masc nom) "Sat down" "Sit" is kathizô, which means "to make sit down," "to seat," "to place," "to sit," "to post," "to take seats," "to convene," "to appoint," "to establish," "to put in a certain condition," "to reside," "to sink down," "to run aground [for ships]," "to recline at meals," and "to settle." From the Greek kata("down") hedraios ("to settle") . -- "Sit...down" is a Greek verb  "to make sit down," "to seat," "to place," "to sit," "to post," "to take seats," "to convene," "to appoint,"  and "to establish."

καθωπλισμένος [1 verse](part sg perf mp masc nom) "Armed" is kathoplizo, which means "equip", "arm fully", "array", and "set in order" (metaphorically). - -The Greek word translated as "armed" means "equip", "arm fully", "array", and "set in order" (metaphorically).  It also means "set in order" in the sense of "prepared". The Bible only uses it in one verse.

καθὼς [36 verses] (adv) "How" is kathos, which means "even as," "how," and, in relating to time, "as" and "when." -- "As" is from a Greek word that means which means "even as," "how," and, in relating to time, "as" and "when."

καθότι [1 verse]( adv ) "Forsomuch as" is from kathoti, that means " in what manner. "so far as", and "inasmuch as." -- "Forsomuch as" is from an adverb that appears for the only in the Gospels here. Since adverbs are usually very common, this is unusual. Why this specific word?

κατισχύσητε [1 verse], (verb 2nd pl aor subj act or verb 2nd pl fut ind act ) "You may be accounted worthy"  is katischyō, which means to "overpower," "prevail over," and "come to one's full strength." The KJV confuses it with kataxioō (καταξιωθέντες).