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-ulous

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  1. a suffix occurring in adjectives borrowed from Latin, with the meaning “inclined to do, habitually engaging in” the action specified by the initial element: bibulous; credulous; garrulous; tremulous.
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Origin of -ulous

< Latin -ulus, -ula, -ulum; see -ule, -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018