Tetra
One Greek prefix is in or im.
The Greek prefix for 6 is "hexa-".
the greek prefix para means beyond
The Greek Prefix for 12 is dodeca. For Example O12 would be dodecoxide.
The prefix "mono-" derives from the Greek language. The equivalent Latin prefix would be "uni-".
The Greek prefix for C2H6 is "eth-," derived from the Greek word for two (eth).
hepta or hept-
The prefix "mono" comes from the Greek language.
No, "seismo" is not a Greek prefix. The Greek prefix for earthquake is "seismo-." In Greek, "seismos" means earthquake, so "seismo-" is used as a prefix in words related to earthquakes or seismic activity.
Quadrahedral is not a word. A tetrahedron (tetra- is the Greek prefix for four, as opposed to quadra-, which is Latin for four) is a four-sided solid figure, basically a pyramid formed from four equilateral triangles.
poly- eg:polygamy
It is not Greek and has no Greek meaning.