πράξαντες [1 verse](part pl aor act masc nom) "Have done" is from prosso, which means "to pass over", "to pass through", "achieve", "effect", "accomplish", "attempt", "plot", "manage", "transact", "negotiate", "extract", "deal with," and "finish off."  -  (WF) "Done" is from a word that means "to pass over", "to pass through", "achieve", "effect", "accomplish", "attempt", "plot", "manage", "transact", "negotiate", "extract", "deal with," and "finish off."

προσέταξεν [2 verses](3rd sg aor ind act) "Commanded" is from prostasso, which means "to place", "to post", "to attach to", "to command", "to prescribe", "to enjoin," and "to order." -- The word translated as "commanded" primarily means "to place." It means command in the sense of a law or rule that is "put in place." This is also a very unusual word for Jesus, used only in two verses.

προσθεῖναι [7 verses] (aor inf act) "Shall be added" is prostithemi, which is formed from two root words that mean "to put towards" and means to "put to", "to hold close", "to apply medicine [to a wound]", "to hand over", "to give something more", "to impose upon", "to attribute to", "to add", "to agree", "to associate with", "to bring upon oneself," and "to apply to oneself." -- The Greek word translated as "shall be added" means "to apply", "to deliver," "to impose upon," and many other meanings. It has the general sense of "increase."

πρότερον; [1 verse](adj sg masc acc) "Before" is from proteros, which means of place: "before", "in front," of time: "former", "earlier", "superior [in rank]," "foremost [in place]", "first [of time]", "first in order of existence [in philosophy]", "primary", "highest degree," as a noun: "first part", "beginning", "primary things", "elements," and, as an adverb, "before", "earlier."

προθέσεως [3 verses](noun sg fem gen ) "Shew..." is prothesis, which means "placing in public," "public notice," "offering," "purpose," "end proposed," "goodwill," "supposition," "calculation," "prefixing," "placing first," and, in grammar, "preposition."  -  The word for "shew" is a word that means "placing in public," "public notice," or "offering."