The alpha, or any other short vowel ending of a Greek prefix metamorphoses into a longer vowel, usually eta, when combining a prefix with a root word beginning with a vowel.
One Greek prefix is in or im.
the greek prefix para means beyond
The prefix "mono-" derives from the Greek language. The equivalent Latin prefix would be "uni-".
Greek.
Greek
It is not Greek and has no Greek meaning.
The previous answer here was "greek". Unfortunately, this is incorrect; perhaps it was a guess? The correct answer is Latin; reference: http://en.wikipedia.org/wiki/Greek_and_Latin_roots_in_English .
Greek and Latin and Sanskrit.
Penta is of Greek origin.
The prefix is dodeca- which, in Greek, refers to 12.
The prefix "mis-" is of Latin origin. It is commonly used to indicate a sense of wrongness or badness.
The Greek prefix for 20 is ICOSA or ICOSI.