-acious

From (1) -aci(ty) +‎ -ous and (2) from Old French -acieux , both ultimately from Latin -ācitās .

-acious

1. Used to form adjectives from nouns and verb stems.

   audacity → audacious

   sage → sagacious

   fallacy → fallacious

• "-acious", in OED Online Paid subscription required ⁠, Oxford: Oxford University Press, launched 2000.

• English terms suffixed with -ous
• English terms derived from Old French
• English terms derived from Latin
• English lemmas
• English suffixes
• English adjective-forming suffixes

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