ἐπιορκήσεις, [1 verse](2nd sg aor subj act )"Thou shalt...forswear thyself," is epiorkeo, (2nd sg aor subj act) -- The Greek word translated as "forswear" specifically means "to swear falsely', "recant," or "renege" on a promise. Its meaning is literally "against an oath." Its root word is the same as the noun translated later in this verse as "oath."  It is the negative verbal form of that word below. This word is only used by Jesus here.which means "to swear falsely," and "to forswear oneself."

ἐπιούσιον [2 verses](adj sg neut acc) "Daily" is epiousios, which may mean, "the appropriate," "sufficient for the coming," which first appears in Greek here. It could be an adjective from the verb epiousa, which means "to come on, to approach." It may also be from epi-eimi meaning literally "upon being" or "being upon." Some suggest is means "over being" or "above being" (from another meaning of epi) with the sense of meaning "supernatural" or "super-essential." Discussion about its possible meanings go back to the very early Christian writers. It is not the Greek word "daily," which is a form of the word "day.." -- (WW)  The word translated as "daily" is a mystery and one of the most interesting words in the Gospels. See this article for a complete historical discussion of this word. Its most likely and literal meaning is "existing upon."

ἐπέπεσεν [1 verse](verb 3rd sg aor ind act ) "Fell" is epipipto, which means to "fall upon", "fall over", "accrue", "come on after", and "accumulate".-- "Fell" is a Greek verb that Jesus only uses here that means to "fall upon", "fall over", "accrue", "come on after", and "accumulate".

ἐπεσκέψασθέ [2 verses] (verb 2nd pl aor ind mp) "Visited is episkeptomai, from which means to "pass in review," hence, "number" a host. It is a compound word from -skeptomai, which means "look about carefully," "spy" ,"to look upon or at," "to observe," "to examine," and "to consider."  The source of our word "skeptic." And a prefix, epi-, meaning "Against" is from epi. which means "on," "upon," "at," "by," "before," "across," and "against."

ἐπιστραφήτω. [9 times](3rd sg aor imperat pass) "Return" is epistrepho, which means "to turn about," "to turn around," "turn towards," "return," "curve," "twist," "go back-and forwards," "pay attention to," "to turn one's mind towards," "regard," "conduct oneself," and "behave," and in the passive to "be converted," "to be distorted," "turn oneself round," "are turned," and as an adjective, "earnest," "vehement." -- "Return" is translated from a Greek word "to turn about" or "to turn around," but also means "cause to return" and "to turn one's mind towards" something. In the passive, which is used here, it means "to turn oneself around" or "be turned around."