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-acy

American  

  1. a suffix of nouns of quality, state, office, etc., many of which accompany adjectives ending in -acious or nouns or adjectives ending in -ate: fallacy; papacy; legacy; delicacy; piracy.

Etymology

Origin of -acy

< Latin -ācia, -ātia (spelling interchangeably in Medieval Latin, reflecting the Rom merger of the forms); these are in turn complexes of -āc- and -āt- -ate 1 + -ia -y 3. Cf. -cracy

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.