adjective suffix

: full of : having a large amount of : having the quality of

Full Definition of -OUS

:  full of :  abounding in :  having :  possessing the qualities of <clamorous> <poisonous>
:  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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