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

Nearby words

  1. -acea,
  2. -aceae,
  3. -aceous,
  4. -acious,
  5. -acity,
  6. -ad,
  7. -ade,
  8. -adelphous,
  9. -ades,
  10. -ado

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- -ate1 + -ia -y3. Cf. -cracy

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019