-ious

-ious

variant of -ous, added to stems of Latin origin, often with corresponding nouns ending in -ity:, atrocious; hilarious.
Compare -eous.


Origin:
Middle EnglishLatin -iōsus (see -i-, -ose1) and Latin -ius (masculine singular adj. ending, as in varius)

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-ious
 
suffix forming adjectives
Compare -eous characterized by or full of: ambitious; religious; suspicious
 
[from Latin -ius and -iōsus full of]

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