30. What is the etymology of "pseudonym"?—Give an example of a pseudonym.
DIVISION II.—ADDITIONAL GREEK ROOTS AND THEIR DERIVATIVES.
ach'os, pain—ache, headache.
ainig'ma, a riddle—enigma.
ak'me, a point—acme.
akou'ein, to hear—acoustics.
ak'ros, high—acropolis (polis).
allel'on, each other—parallel, parallelogram.
an'er, a man—Andrew, Alexander.