ἀνίπτοις [1 verse](adj pl fem dat) "unwashen" is from anipto," which means "unwashen," "unprepared," and "not washed out."  - - The word "unwashen" is an adjective that means that something is "unwashed" or has never been washed.

ἀναστήσονται [28 verses](3rd pl fut ind mid) "Shall rise" is from anistemi, which means "to make stand up," "to raise up," "to raise from sleep," "to wake up," "to raise from the dead," "to rouse to action," "to put up for sale," "to make people rise," "to emigrate," "to transplant," and "to rise and leave the sanctuary." -- "Shall rise " is a Greek verb that means "to make to stand up," "to raise from the dead," "to rouse to action," and "to make people rise up." Its root is usually translated as "stand," and its prefix as "up" or "over." So it literally means “to make stand up.”  It is used elsewhere in ancient Greek to refer to “raising the dead.” However, its secondary meaning was “to raise from sleep,” “wake up,” “to rouse to action,” and “to stir up.” It was used to refer to erecting a building. It also means “to rise to go,” “to set out,” and “to go away.”

ἄνω   - [1 verse](adv) "Above" is from ano, which is an adverb meaning "upwards", "above," "aloft", "on high", "in heaven", "with the gods," and "the upper parts [of the body]."

ἀνάγαιον [2 verses]( noun sg neut acc ) "Upper room" is  anōgeon, which means "upper room" from its literal meaning "high ground". -- "Upper room" is  from a Greek word that only appears in this verse and the parallel verse in Mark. It gets the meaning  "upper room" from its literal meaning "high ground". This word is not used anywhere else in ancient Greek in the Perseus database. Nor does it appear in the Septuagint, which is very unusual. This may have been a local Greek word not in common use elsewhere.

ἀνοιγήσεται [9 verses](3rd sg fut ind pass) "Open" is anoigo, which means "to open", "to throw open," and "to disclose." --- The verb translated as "opens" means "to open up," "to disclose" or "to lay open."  It is the root verb. meaning "open" with the prefix meaning "up." It means revealing something that is there, but that you cannot access.