-ous
-ous
adj suffixDefinition of -OUS
1
: full of : abounding in : having : possessing the qualities of <clamorous> <poisonous>
2
: having a valence lower than in compounds or ions named with an adjective ending in -ic <mercurous>
Origin of -OUS
Middle English, from Anglo-French -us, -ous, from Latin -osus
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