Is Cy A Prefix?

Is Cy A Prefix? a suffix used to form abstract nouns from adjectives with stems in -t, -te, -tic, and especially -nt (democracy; accuracy; expediency; stagnancy; lunacy), and sometimes used to form action nouns (vacancy; occupancy). What words use the suffix Cy? emergency. frequency. democracy. pregnancy. occupancy. diplomacy. supremacy. residency. Is Cy an affix? Also